src/zoom-c.c

   1 /*
   2  * Copyright (c) 2000-2004, Index Data
   3  * See the file LICENSE for details.
   4  *
   5  * $Id: zoom-c.c,v 1.25 2004-02-23 09:26:11 adam Exp $
   6  *
   7  * ZOOM layer for C, connections, result sets, queries.
   8  */
   9 #include <assert.h>
  10 #include <string.h>
  11 #include "zoom-p.h"
  12
  13 #include <yaz/yaz-util.h>
  14 #include <yaz/xmalloc.h>
  15 #include <yaz/otherinfo.h>
  16 #include <yaz/log.h>
  17 #include <yaz/pquery.h>
  18 #include <yaz/marcdisp.h>
  19 #include <yaz/diagbib1.h>
  20 #include <yaz/charneg.h>
  21 #include <yaz/ill.h>
  22 #include <yaz/srw.h>
  23
  24 #if HAVE_SYS_POLL_H
  25 #include <sys/poll.h>
  26 #endif
  27
  28 typedef enum {
  29     zoom_pending,
  30     zoom_complete
  31 } zoom_ret;
  32
  33 static zoom_ret ZOOM_connection_send_init (ZOOM_connection c);
  34 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out);
  35
  36 static ZOOM_Event ZOOM_Event_create (int kind)
  37 {
  38     ZOOM_Event event = (ZOOM_Event) xmalloc (sizeof(*event));
  39     event->kind = kind;
  40     event->next = 0;
  41     event->prev = 0;
  42     return event;
  43 }
  44
  45 static void ZOOM_Event_destroy (ZOOM_Event event)
  46 {
  47     xfree (event);
  48 }
  49
  50 static void ZOOM_connection_put_event (ZOOM_connection c, ZOOM_Event event)
  51 {
  52     if (c->m_queue_back)
  53     {
  54         c->m_queue_back->prev = event;
  55         assert (c->m_queue_front);
  56     }
  57     else
  58     {
  59         assert (!c->m_queue_front);
  60         c->m_queue_front = event;
  61     }
  62     event->next = c->m_queue_back;
  63     event->prev = 0;
  64     c->m_queue_back = event;
  65 }
  66
  67 static ZOOM_Event ZOOM_connection_get_event(ZOOM_connection c)
  68 {
  69     ZOOM_Event event = c->m_queue_front;
  70     if (!event)
  71     {
  72         c->last_event = ZOOM_EVENT_NONE;
  73         return 0;
  74     }
  75     assert (c->m_queue_back);
  76     c->m_queue_front = event->prev;
  77     if (c->m_queue_front)
  78     {
  79         assert (c->m_queue_back);
  80         c->m_queue_front->next = 0;
  81     }
  82     else
  83         c->m_queue_back = 0;
  84     c->last_event = event->kind;
  85     return event;
  86 }
  87
  88
  89 static void set_dset_error (ZOOM_connection c, int error,
  90                             const char *dset,
  91                             const char *addinfo, const char *addinfo2)
  92 {
  93     char *cp;
  94     xfree (c->addinfo);
  95     c->addinfo = 0;
  96     c->error = error;
  97     if (!c->diagset || strcmp(dset, c->diagset))
  98     {
  99         xfree(c->diagset);
 100         c->diagset = xstrdup(dset);
 101         /* remove integer part from SRW diagset .. */
 102         if ((cp = strrchr(c->diagset, '/')))
 103            *cp = '\0';
 104     }
 105     if (addinfo && addinfo2)
 106     {
 107         c->addinfo = xmalloc(strlen(addinfo) + strlen(addinfo2) + 2);
 108         strcpy(c->addinfo, addinfo);
 109         strcat(c->addinfo, addinfo2);
 110     }
 111     else if (addinfo)
 112         c->addinfo = xstrdup(addinfo);
 113     if (error)
 114         yaz_log(LOG_DEBUG, "Error %s %s:%d %s %s",
 115                 c->host_port ? c->host_port : "<>", dset, error,
 116                 addinfo ? addinfo : "",
 117                 addinfo2 ? addinfo2 : "");
 118 }
 119
 120 #if HAVE_XML2
 121 static void set_HTTP_error (ZOOM_connection c, int error,
 122                             const char *addinfo, const char *addinfo2)
 123 {
 124     set_dset_error(c, error, "HTTP", addinfo, addinfo2);
 125 }
 126 #endif
 127
 128 static void set_ZOOM_error (ZOOM_connection c, int error,
 129                             const char *addinfo)
 130 {
 131     set_dset_error(c, error, "ZOOM", addinfo, 0);
 132 }
 133
 134 static void clear_error (ZOOM_connection c)
 135 {
 136
 137     switch (c->error)
 138     {
 139     case ZOOM_ERROR_CONNECT:
 140     case ZOOM_ERROR_MEMORY:
 141     case ZOOM_ERROR_DECODE:
 142     case ZOOM_ERROR_CONNECTION_LOST:
 143     case ZOOM_ERROR_INIT:
 144     case ZOOM_ERROR_INTERNAL:
 145     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
 146         break;
 147     default:
 148         set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 149     }
 150 }
 151
 152 ZOOM_task ZOOM_connection_add_task (ZOOM_connection c, int which)
 153 {
 154     ZOOM_task *taskp = &c->tasks;
 155     while (*taskp)
 156         taskp = &(*taskp)->next;
 157     *taskp = (ZOOM_task) xmalloc (sizeof(**taskp));
 158     (*taskp)->running = 0;
 159     (*taskp)->which = which;
 160     (*taskp)->next = 0;
 161     clear_error (c);
 162     return *taskp;
 163 }
 164
 165 ZOOM_task ZOOM_connection_insert_task (ZOOM_connection c, int which)
 166 {
 167     ZOOM_task task = (ZOOM_task) xmalloc (sizeof(*task));
 168
 169     task->next = c->tasks;
 170     c->tasks = task;
 171
 172     task->running = 0;
 173     task->which = which;
 174     clear_error (c);
 175     return task;
 176 }
 177
 178 void ZOOM_connection_remove_task (ZOOM_connection c)
 179 {
 180     ZOOM_task task = c->tasks;
 181
 182     if (task)
 183     {
 184         c->tasks = task->next;
 185         switch (task->which)
 186         {
 187         case ZOOM_TASK_SEARCH:
 188
 189             ZOOM_resultset_destroy (task->u.search.resultset);
 190             break;
 191         case ZOOM_TASK_RETRIEVE:
 192             ZOOM_resultset_destroy (task->u.retrieve.resultset);
 193             break;
 194         case ZOOM_TASK_CONNECT:
 195             break;
 196         case ZOOM_TASK_SCAN:
 197             ZOOM_scanset_destroy (task->u.scan.scan);
 198             break;
 199         case ZOOM_TASK_PACKAGE:
 200             ZOOM_package_destroy (task->u.package);
 201             break;
 202         case ZOOM_TASK_SORT:
 203             ZOOM_resultset_destroy (task->u.sort.resultset);
 204             ZOOM_query_destroy(task->u.sort.q);
 205             break;
 206         default:
 207             assert (0);
 208         }
 209         xfree (task);
 210     }
 211 }
 212
 213 static int ZOOM_connection_exec_task (ZOOM_connection c);
 214
 215 void ZOOM_connection_remove_tasks (ZOOM_connection c)
 216 {
 217     while (c->tasks)
 218         ZOOM_connection_remove_task(c);
 219 }
 220
 221 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos);
 222
 223 ZOOM_API(ZOOM_connection)
 224 ZOOM_connection_create (ZOOM_options options)
 225 {
 226     ZOOM_connection c = (ZOOM_connection) xmalloc (sizeof(*c));
 227
 228     c->proto = PROTO_Z3950;
 229     c->cs = 0;
 230     c->mask = 0;
 231     c->reconnect_ok = 0;
 232     c->state = STATE_IDLE;
 233     c->addinfo = 0;
 234     c->diagset = 0;
 235     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 236     c->buf_in = 0;
 237     c->len_in = 0;
 238     c->buf_out = 0;
 239     c->len_out = 0;
 240     c->resultsets = 0;
 241
 242     c->options = ZOOM_options_create_with_parent(options);
 243
 244     c->host_port = 0;
 245     c->path = 0;
 246     c->proxy = 0;
 247
 248     c->charset = c->lang = 0;
 249
 250     c->cookie_out = 0;
 251     c->cookie_in = 0;
 252     c->client_IP = 0;
 253     c->tasks = 0;
 254
 255     c->odr_in = odr_createmem (ODR_DECODE);
 256     c->odr_out = odr_createmem (ODR_ENCODE);
 257
 258     c->async = 0;
 259     c->support_named_resultsets = 0;
 260     c->last_event = ZOOM_EVENT_NONE;
 261
 262     c->m_queue_front = 0;
 263     c->m_queue_back = 0;
 264     return c;
 265 }
 266
 267 /* set database names. Take local databases (if set); otherwise
 268    take databases given in ZURL (if set); otherwise use Default */
 269 static char **set_DatabaseNames (ZOOM_connection con, ZOOM_options options,
 270                                  int *num)
 271 {
 272     char **databaseNames;
 273     const char *c;
 274     int no = 2;
 275     const char *cp = ZOOM_options_get (options, "databaseName");
 276
 277     if (!cp || !*cp)
 278     {
 279         if (strncmp (con->host_port, "unix:", 5) == 0)
 280             cp = strchr (con->host_port+5, ':');
 281         else
 282             cp = strchr (con->host_port, '/');
 283         if (cp)
 284             cp++;
 285     }
 286     if (cp)
 287     {
 288         c = cp;
 289         while ((c = strchr(c, '+')))
 290         {
 291             c++;
 292             no++;
 293         }
 294     }
 295     else
 296         cp = "Default";
 297     databaseNames = (char**)
 298         odr_malloc (con->odr_out, no * sizeof(*databaseNames));
 299     no = 0;
 300     while (*cp)
 301     {
 302         c = strchr (cp, '+');
 303         if (!c)
 304             c = cp + strlen(cp);
 305         else if (c == cp)
 306         {
 307             cp++;
 308             continue;
 309         }
 310         /* cp ptr to first char of db name, c is char
 311            following db name */
 312         databaseNames[no] = (char*) odr_malloc (con->odr_out, 1+c-cp);
 313         memcpy (databaseNames[no], cp, c-cp);
 314         databaseNames[no++][c-cp] = '\0';
 315         cp = c;
 316         if (*cp)
 317             cp++;
 318     }
 319     databaseNames[no] = NULL;
 320     *num = no;
 321     return databaseNames;
 322 }
 323
 324 ZOOM_API(ZOOM_connection)
 325 ZOOM_connection_new (const char *host, int portnum)
 326 {
 327     ZOOM_connection c = ZOOM_connection_create (0);
 328
 329     ZOOM_connection_connect (c, host, portnum);
 330     return c;
 331 }
 332
 333 ZOOM_API(void)
 334 ZOOM_connection_connect(ZOOM_connection c,
 335                         const char *host, int portnum)
 336 {
 337     const char *val;
 338     ZOOM_task task;
 339
 340     if (c->cs)
 341     {
 342         yaz_log (LOG_DEBUG, "reconnect");
 343         c->reconnect_ok = 1;
 344         return;
 345     }
 346     yaz_log(LOG_DEBUG, "connect");
 347     xfree (c->proxy);
 348     val = ZOOM_options_get (c->options, "proxy");
 349     if (val && *val)
 350         c->proxy = xstrdup (val);
 351     else
 352         c->proxy = 0;
 353
 354     xfree (c->charset);
 355     val = ZOOM_options_get (c->options, "charset");
 356     if (val && *val)
 357         c->charset = xstrdup (val);
 358     else
 359         c->charset = 0;
 360
 361     xfree (c->lang);
 362     val = ZOOM_options_get (c->options, "lang");
 363     if (val && *val)
 364         c->lang = xstrdup (val);
 365     else
 366         c->lang = 0;
 367
 368     xfree (c->host_port);
 369     if (portnum)
 370     {
 371         char hostn[128];
 372         sprintf (hostn, "%.80s:%d", host, portnum);
 373         c->host_port = xstrdup(hostn);
 374     }
 375     else
 376         c->host_port = xstrdup(host);
 377
 378     ZOOM_options_set(c->options, "host", c->host_port);
 379
 380     val = ZOOM_options_get (c->options, "cookie");
 381     if (val && *val)
 382         c->cookie_out = xstrdup (val);
 383
 384     val = ZOOM_options_get (c->options, "clientIP");
 385     if (val && *val)
 386         c->client_IP = xstrdup (val);
 387
 388     c->async = ZOOM_options_get_bool (c->options, "async", 0);
 389
 390     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 391
 392     task = ZOOM_connection_add_task (c, ZOOM_TASK_CONNECT);
 393
 394     if (!c->async)
 395     {
 396         while (ZOOM_event (1, &c))
 397             ;
 398     }
 399 }
 400
 401 ZOOM_API(ZOOM_query)
 402 ZOOM_query_create(void)
 403 {
 404     ZOOM_query s = (ZOOM_query) xmalloc (sizeof(*s));
 405
 406     s->refcount = 1;
 407     s->z_query = 0;
 408     s->sort_spec = 0;
 409     s->odr = odr_createmem (ODR_ENCODE);
 410     s->query_string = 0;
 411
 412     return s;
 413 }
 414
 415 ZOOM_API(void)
 416 ZOOM_query_destroy(ZOOM_query s)
 417 {
 418     if (!s)
 419         return;
 420
 421     (s->refcount)--;
 422     yaz_log (LOG_DEBUG, "ZOOM_query_destroy count=%d", s->refcount);
 423     if (s->refcount == 0)
 424     {
 425         odr_destroy (s->odr);
 426         xfree (s);
 427     }
 428 }
 429
 430 ZOOM_API(int)
 431 ZOOM_query_prefix(ZOOM_query s, const char *str)
 432 {
 433     s->query_string = odr_strdup(s->odr, str);
 434     s->z_query = (Z_Query *) odr_malloc (s->odr, sizeof(*s->z_query));
 435     s->z_query->which = Z_Query_type_1;
 436     s->z_query->u.type_1 =  p_query_rpn(s->odr, PROTO_Z3950, str);
 437     if (!s->z_query->u.type_1)
 438     {
 439         s->z_query = 0;
 440         return -1;
 441     }
 442     return 0;
 443 }
 444
 445 ZOOM_API(int)
 446 ZOOM_query_cql(ZOOM_query s, const char *str)
 447 {
 448     Z_External *ext;
 449
 450     s->query_string = odr_strdup(s->odr, str);
 451
 452     ext = (Z_External *) odr_malloc(s->odr, sizeof(*ext));
 453     ext->direct_reference = odr_getoidbystr(s->odr, "1.2.840.10003.16.2");
 454     ext->indirect_reference = 0;
 455     ext->descriptor = 0;
 456     ext->which = Z_External_CQL;
 457     ext->u.cql = s->query_string;
 458
 459     s->z_query = (Z_Query *) odr_malloc (s->odr, sizeof(*s->z_query));
 460     s->z_query->which = Z_Query_type_104;
 461     s->z_query->u.type_104 =  ext;
 462
 463     return 0;
 464 }
 465
 466 ZOOM_API(int)
 467 ZOOM_query_sortby(ZOOM_query s, const char *criteria)
 468 {
 469     s->sort_spec = yaz_sort_spec (s->odr, criteria);
 470     if (!s->sort_spec)
 471         return -1;
 472     return 0;
 473 }
 474
 475 static zoom_ret do_write(ZOOM_connection c);
 476
 477 ZOOM_API(void)
 478 ZOOM_connection_destroy(ZOOM_connection c)
 479 {
 480     ZOOM_resultset r;
 481     if (!c)
 482         return;
 483     if (c->cs)
 484         cs_close (c->cs);
 485     for (r = c->resultsets; r; r = r->next)
 486         r->connection = 0;
 487
 488     xfree (c->buf_in);
 489     xfree (c->addinfo);
 490     xfree (c->diagset);
 491     odr_destroy (c->odr_in);
 492     odr_destroy (c->odr_out);
 493     ZOOM_options_destroy (c->options);
 494     ZOOM_connection_remove_tasks (c);
 495     xfree (c->host_port);
 496     xfree (c->path);
 497     xfree (c->proxy);
 498     xfree (c->charset);
 499     xfree (c->lang);
 500     xfree (c->cookie_out);
 501     xfree (c->cookie_in);
 502     xfree (c->client_IP);
 503     xfree (c);
 504 }
 505
 506 void ZOOM_resultset_addref (ZOOM_resultset r)
 507 {
 508     if (r)
 509     {
 510         (r->refcount)++;
 511         yaz_log (LOG_DEBUG, "ZOOM_resultset_addref r=%p count=%d",
 512                  r, r->refcount);
 513     }
 514 }
 515
 516 ZOOM_resultset ZOOM_resultset_create ()
 517 {
 518     ZOOM_resultset r = (ZOOM_resultset) xmalloc (sizeof(*r));
 519
 520     yaz_log (LOG_DEBUG, "ZOOM_resultset_create r = %p", r);
 521     r->refcount = 1;
 522     r->size = 0;
 523     r->odr = odr_createmem (ODR_ENCODE);
 524     r->start = 0;
 525     r->piggyback = 1;
 526     r->setname = 0;
 527     r->schema = 0;
 528     r->count = 0;
 529     r->step = 0;
 530     r->record_cache = 0;
 531     r->r_sort_spec = 0;
 532     r->query = 0;
 533     r->connection = 0;
 534     r->next = 0;
 535     return r;
 536 }
 537
 538 ZOOM_API(ZOOM_resultset)
 539 ZOOM_connection_search_pqf(ZOOM_connection c, const char *q)
 540 {
 541     ZOOM_resultset r;
 542     ZOOM_query s = ZOOM_query_create();
 543
 544     ZOOM_query_prefix (s, q);
 545
 546     r = ZOOM_connection_search (c, s);
 547     ZOOM_query_destroy (s);
 548     return r;
 549 }
 550
 551 ZOOM_API(ZOOM_resultset)
 552 ZOOM_connection_search(ZOOM_connection c, ZOOM_query q)
 553 {
 554     ZOOM_resultset r = ZOOM_resultset_create ();
 555     ZOOM_task task;
 556     const char *cp;
 557
 558     r->r_sort_spec = q->sort_spec;
 559     r->query = q;
 560
 561     r->options = ZOOM_options_create_with_parent(c->options);
 562
 563     r->start = ZOOM_options_get_int(r->options, "start", 0);
 564     r->count = ZOOM_options_get_int(r->options, "count", 0);
 565     {
 566         /* If "presentChunk" is defined use that; otherwise "step" */
 567         const char *cp = ZOOM_options_get (r->options, "presentChunk");
 568         r->step = ZOOM_options_get_int(r->options,
 569                                        (cp != 0 ? "presentChunk": "step"), 0);
 570     }
 571     r->piggyback = ZOOM_options_get_bool (r->options, "piggyback", 1);
 572     cp = ZOOM_options_get (r->options, "setname");
 573     if (cp)
 574         r->setname = xstrdup(cp);
 575     cp = ZOOM_options_get (r->options, "schema");
 576     if (cp)
 577         r->schema = xstrdup(cp);
 578
 579     r->connection = c;
 580
 581     r->next = c->resultsets;
 582     c->resultsets = r;
 583
 584     if (c->host_port && c->proto == PROTO_HTTP)
 585     {
 586         if (!c->cs)
 587         {
 588             yaz_log(LOG_DEBUG, "NO COMSTACK");
 589             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 590         }
 591         else
 592         {
 593             yaz_log(LOG_DEBUG, "PREPARE FOR RECONNECT");
 594             c->reconnect_ok = 1;
 595         }
 596     }
 597
 598     task = ZOOM_connection_add_task (c, ZOOM_TASK_SEARCH);
 599     task->u.search.resultset = r;
 600     ZOOM_resultset_addref (r);
 601
 602     (q->refcount)++;
 603
 604     if (!c->async)
 605     {
 606         while (ZOOM_event (1, &c))
 607             ;
 608     }
 609     return r;
 610 }
 611
 612 ZOOM_API(void)
 613     ZOOM_resultset_sort(ZOOM_resultset r,
 614                         const char *sort_type, const char *sort_spec)
 615 {
 616     ZOOM_connection c = r->connection;
 617     ZOOM_task task;
 618
 619     if (!c)
 620         return;
 621
 622     if (c->host_port && c->proto == PROTO_HTTP)
 623     {
 624         if (!c->cs)
 625         {
 626             yaz_log(LOG_DEBUG, "NO COMSTACK");
 627             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 628         }
 629         else
 630         {
 631             yaz_log(LOG_DEBUG, "PREPARE FOR RECONNECT");
 632             c->reconnect_ok = 1;
 633         }
 634     }
 635
 636     ZOOM_resultset_cache_reset(r);
 637     task = ZOOM_connection_add_task (c, ZOOM_TASK_SORT);
 638     task->u.sort.resultset = r;
 639     task->u.sort.q = ZOOM_query_create();
 640     ZOOM_query_sortby(task->u.sort.q, sort_spec);
 641
 642     ZOOM_resultset_addref (r);
 643
 644     if (!c->async)
 645     {
 646         while (ZOOM_event (1, &c))
 647             ;
 648     }
 649 }
 650
 651 ZOOM_API(void)
 652     ZOOM_resultset_cache_reset(ZOOM_resultset r)
 653 {
 654     ZOOM_record_cache rc;
 655
 656     for (rc = r->record_cache; rc; rc = rc->next)
 657     {
 658         if (rc->rec.wrbuf_marc)
 659             wrbuf_free (rc->rec.wrbuf_marc, 1);
 660         if (rc->rec.wrbuf_iconv)
 661             wrbuf_free (rc->rec.wrbuf_iconv, 1);
 662         if (rc->rec.wrbuf_opac)
 663             wrbuf_free (rc->rec.wrbuf_opac, 1);
 664     }
 665     r->record_cache = 0;
 666 }
 667
 668 ZOOM_API(void)
 669 ZOOM_resultset_destroy(ZOOM_resultset r)
 670 {
 671     if (!r)
 672         return;
 673     (r->refcount)--;
 674     yaz_log (LOG_DEBUG, "ZOOM_resultset_destroy r = %p count=%d",
 675              r, r->refcount);
 676     if (r->refcount == 0)
 677     {
 678         ZOOM_resultset_cache_reset(r);
 679
 680         if (r->connection)
 681         {
 682             /* remove ourselves from the resultsets in connection */
 683             ZOOM_resultset *rp = &r->connection->resultsets;
 684             while (1)
 685             {
 686                 assert (*rp);   /* we must be in this list!! */
 687                 if (*rp == r)
 688                 {   /* OK, we're here - take us out of it */
 689                     *rp = (*rp)->next;
 690                     break;
 691                 }
 692                 rp = &(*rp)->next;
 693             }
 694         }
 695         ZOOM_query_destroy (r->query);
 696         ZOOM_options_destroy (r->options);
 697         odr_destroy (r->odr);
 698         xfree (r->setname);
 699         xfree (r->schema);
 700         xfree (r);
 701     }
 702 }
 703
 704 ZOOM_API(size_t)
 705 ZOOM_resultset_size (ZOOM_resultset r)
 706 {
 707     return r->size;
 708 }
 709
 710 static void do_close (ZOOM_connection c)
 711 {
 712     if (c->cs)
 713         cs_close(c->cs);
 714     c->cs = 0;
 715     c->mask = 0;
 716     c->state = STATE_IDLE;
 717 }
 718
 719 static void ZOOM_resultset_retrieve (ZOOM_resultset r,
 720                                      int force_sync, int start, int count)
 721 {
 722     ZOOM_task task;
 723     ZOOM_connection c;
 724     const char *cp;
 725
 726     if (!r)
 727         return;
 728     c = r->connection;
 729     if (!c)
 730         return;
 731
 732     if (c->host_port && c->proto == PROTO_HTTP)
 733     {
 734         if (!c->cs)
 735         {
 736             yaz_log(LOG_DEBUG, "NO COMSTACK");
 737             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 738         }
 739         else
 740         {
 741             yaz_log(LOG_DEBUG, "PREPARE FOR RECONNECT");
 742             c->reconnect_ok = 1;
 743         }
 744     }
 745     task = ZOOM_connection_add_task (c, ZOOM_TASK_RETRIEVE);
 746     task->u.retrieve.resultset = r;
 747     task->u.retrieve.start = start;
 748     task->u.retrieve.count = count;
 749
 750     cp = ZOOM_options_get (r->options, "schema");
 751     if (cp)
 752     {
 753         if (!r->schema || strcmp(r->schema, cp))
 754         {
 755             xfree(r->schema);
 756             r->schema = xstrdup(cp);
 757         }
 758     }
 759
 760     ZOOM_resultset_addref (r);
 761
 762     if (!r->connection->async || force_sync)
 763         while (r->connection && ZOOM_event (1, &r->connection))
 764             ;
 765 }
 766
 767 ZOOM_API(void)
 768 ZOOM_resultset_records (ZOOM_resultset r, ZOOM_record *recs,
 769                         size_t start, size_t count)
 770 {
 771     int force_present = 0;
 772
 773     if (!r)
 774         return ;
 775     if (count && recs)
 776         force_present = 1;
 777     ZOOM_resultset_retrieve (r, force_present, start, count);
 778     if (force_present)
 779     {
 780         size_t i;
 781         for (i = 0; i< count; i++)
 782             recs[i] = ZOOM_resultset_record_immediate (r, i+start);
 783     }
 784 }
 785
 786 static zoom_ret do_connect (ZOOM_connection c)
 787 {
 788     void *add;
 789     const char *effective_host;
 790
 791     if (c->proxy)
 792         effective_host = c->proxy;
 793     else
 794         effective_host = c->host_port;
 795
 796     yaz_log (LOG_DEBUG, "do_connect host=%s", effective_host);
 797
 798     assert (!c->cs);
 799     c->cs = cs_create_host (effective_host, 0, &add);
 800
 801     if (c->cs && c->cs->protocol == PROTO_HTTP)
 802     {
 803 #if HAVE_XML2
 804         const char *path = 0;
 805
 806         c->proto = PROTO_HTTP;
 807         cs_get_host_args(c->host_port, &path);
 808         xfree(c->path);
 809         c->path = xmalloc(strlen(path)+2);
 810         c->path[0] = '/';
 811         strcpy (c->path+1, path);
 812 #else
 813         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_PROTOCOL, "SRW");
 814         do_close(c);
 815         return zoom_complete;
 816 #endif
 817     }
 818     if (c->cs)
 819     {
 820         int ret = cs_connect (c->cs, add);
 821         if (ret == 0)
 822         {
 823             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_CONNECT);
 824             ZOOM_connection_put_event(c, event);
 825             if (c->proto == PROTO_Z3950)
 826                 ZOOM_connection_send_init(c);
 827             else
 828             {
 829                 /* no init request for SRW .. */
 830                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
 831                 ZOOM_connection_remove_task (c);
 832                 c->mask = 0;
 833                 ZOOM_connection_exec_task (c);
 834             }
 835             c->state = STATE_ESTABLISHED;
 836             return zoom_pending;
 837         }
 838         else if (ret > 0)
 839         {
 840             c->state = STATE_CONNECTING;
 841             c->mask = ZOOM_SELECT_EXCEPT;
 842             if (c->cs->io_pending & CS_WANT_WRITE)
 843                 c->mask += ZOOM_SELECT_WRITE;
 844             if (c->cs->io_pending & CS_WANT_READ)
 845                 c->mask += ZOOM_SELECT_READ;
 846             return zoom_pending;
 847         }
 848     }
 849     c->state = STATE_IDLE;
 850     set_ZOOM_error(c, ZOOM_ERROR_CONNECT, effective_host);
 851     return zoom_complete;
 852 }
 853
 854 int z3950_connection_socket(ZOOM_connection c)
 855 {
 856     if (c->cs)
 857         return cs_fileno(c->cs);
 858     return -1;
 859 }
 860
 861 int z3950_connection_mask(ZOOM_connection c)
 862 {
 863     if (c->cs)
 864         return c->mask;
 865     return 0;
 866 }
 867
 868 static void otherInfo_attach (ZOOM_connection c, Z_APDU *a, ODR out)
 869 {
 870     int i;
 871     for (i = 0; i<200; i++)
 872     {
 873         size_t len;
 874         Z_OtherInformation **oi;
 875         char buf[80];
 876         const char *val;
 877         const char *cp;
 878         int oidval;
 879
 880         sprintf (buf, "otherInfo%d", i);
 881         val = ZOOM_options_get (c->options, buf);
 882         if (!val)
 883             break;
 884         cp = strchr (val, ':');
 885         if (!cp)
 886             continue;
 887         len = cp - val;
 888         if (len >= sizeof(buf))
 889             len = sizeof(buf)-1;
 890         memcpy (buf, val, len);
 891         buf[len] = '\0';
 892         oidval = oid_getvalbyname (buf);
 893         if (oidval == VAL_NONE)
 894             continue;
 895
 896         yaz_oi_APDU(a, &oi);
 897         yaz_oi_set_string_oidval(oi, out, oidval, 1, cp+1);
 898     }
 899 }
 900
 901 static int encode_APDU(ZOOM_connection c, Z_APDU *a, ODR out)
 902 {
 903     assert (a);
 904     if (c->cookie_out)
 905     {
 906         Z_OtherInformation **oi;
 907         yaz_oi_APDU(a, &oi);
 908         yaz_oi_set_string_oidval(oi, out, VAL_COOKIE, 1, c->cookie_out);
 909     }
 910     if (c->client_IP)
 911     {
 912         Z_OtherInformation **oi;
 913         yaz_oi_APDU(a, &oi);
 914         yaz_oi_set_string_oidval(oi, out, VAL_CLIENT_IP, 1, c->client_IP);
 915     }
 916     otherInfo_attach (c, a, out);
 917     if (!z_APDU(out, &a, 0, 0))
 918     {
 919         FILE *outf = fopen("/tmp/apdu.txt", "a");
 920         if (a && outf)
 921         {
 922             ODR odr_pr = odr_createmem(ODR_PRINT);
 923             fprintf (outf, "a=%p\n", a);
 924             odr_setprint(odr_pr, outf);
 925             z_APDU(odr_pr, &a, 0, 0);
 926             odr_destroy(odr_pr);
 927         }
 928         yaz_log (LOG_DEBUG, "encoding failed");
 929         set_ZOOM_error(c, ZOOM_ERROR_ENCODE, 0);
 930         odr_reset(out);
 931         return -1;
 932     }
 933
 934     return 0;
 935 }
 936
 937 static zoom_ret send_APDU (ZOOM_connection c, Z_APDU *a)
 938 {
 939     ZOOM_Event event;
 940     assert (a);
 941     if (encode_APDU(c, a, c->odr_out))
 942         return zoom_complete;
 943     yaz_log(LOG_DEBUG, "send APDU type=%d", a->which);
 944     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
 945     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
 946     ZOOM_connection_put_event (c, event);
 947     odr_reset(c->odr_out);
 948     return do_write (c);
 949 }
 950
 951 /* returns 1 if PDU was sent OK (still pending )
 952            0 if PDU was not sent OK (nothing to wait for)
 953 */
 954
 955 static zoom_ret ZOOM_connection_send_init (ZOOM_connection c)
 956 {
 957     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_initRequest);
 958     Z_InitRequest *ireq = apdu->u.initRequest;
 959     Z_IdAuthentication *auth = (Z_IdAuthentication *)
 960         odr_malloc(c->odr_out, sizeof(*auth));
 961     const char *auth_groupId = ZOOM_options_get (c->options, "group");
 962     const char *auth_userId = ZOOM_options_get (c->options, "user");
 963     const char *auth_password = ZOOM_options_get (c->options, "password");
 964     char *version;
 965
 966     /* support the pass for backwards compatibility */
 967     if (!auth_password)
 968         auth_password = ZOOM_options_get (c->options, "pass");
 969
 970     ODR_MASK_SET(ireq->options, Z_Options_search);
 971     ODR_MASK_SET(ireq->options, Z_Options_present);
 972     ODR_MASK_SET(ireq->options, Z_Options_scan);
 973     ODR_MASK_SET(ireq->options, Z_Options_sort);
 974     ODR_MASK_SET(ireq->options, Z_Options_extendedServices);
 975     ODR_MASK_SET(ireq->options, Z_Options_namedResultSets);
 976
 977     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_1);
 978     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_2);
 979     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_3);
 980
 981     /* Index Data's Z39.50 Implementor Id is 81 */
 982     ireq->implementationId = odr_prepend(c->odr_out,
 983         ZOOM_options_get(c->options, "implementationId"),
 984         odr_prepend(c->odr_out, "81", ireq->implementationId));
 985
 986     ireq->implementationName = odr_prepend(c->odr_out,
 987         ZOOM_options_get(c->options, "implementationName"),
 988         odr_prepend(c->odr_out, "ZOOM-C", ireq->implementationName));
 989
 990     version = odr_strdup(c->odr_out, "$Revision: 1.25 $");
 991     if (strlen(version) > 10)   /* check for unexpanded CVS strings */
 992         version[strlen(version)-2] = '\0';
 993     ireq->implementationVersion = odr_prepend(c->odr_out,
 994         ZOOM_options_get(c->options, "implementationVersion"),
 995         odr_prepend(c->odr_out, &version[11], ireq->implementationVersion));
 996
 997     *ireq->maximumRecordSize =
 998         ZOOM_options_get_int (c->options, "maximumRecordSize", 1024*1024);
 999     *ireq->preferredMessageSize =
1000         ZOOM_options_get_int (c->options, "preferredMessageSize", 1024*1024);
1001
1002     if (auth_groupId || auth_password)
1003     {
1004         Z_IdPass *pass = (Z_IdPass *) odr_malloc(c->odr_out, sizeof(*pass));
1005         int i = 0;
1006         pass->groupId = 0;
1007         if (auth_groupId && *auth_groupId)
1008         {
1009             pass->groupId = (char *)
1010                 odr_malloc(c->odr_out, strlen(auth_groupId)+1);
1011             strcpy(pass->groupId, auth_groupId);
1012             i++;
1013         }
1014         pass->userId = 0;
1015         if (auth_userId && *auth_userId)
1016         {
1017             pass->userId = (char *)
1018                 odr_malloc(c->odr_out, strlen(auth_userId)+1);
1019             strcpy(pass->userId, auth_userId);
1020             i++;
1021         }
1022         pass->password = 0;
1023         if (auth_password && *auth_password)
1024         {
1025             pass->password = (char *)
1026                 odr_malloc(c->odr_out, strlen(auth_password)+1);
1027             strcpy(pass->password, auth_password);
1028             i++;
1029         }
1030         if (i)
1031         {
1032             auth->which = Z_IdAuthentication_idPass;
1033             auth->u.idPass = pass;
1034             ireq->idAuthentication = auth;
1035         }
1036     }
1037     else if (auth_userId)
1038     {
1039         auth->which = Z_IdAuthentication_open;
1040         auth->u.open = (char *)
1041             odr_malloc(c->odr_out, strlen(auth_userId)+1);
1042         strcpy(auth->u.open, auth_userId);
1043         ireq->idAuthentication = auth;
1044     }
1045     if (c->proxy)
1046         yaz_oi_set_string_oidval(&ireq->otherInfo, c->odr_out,
1047                                  VAL_PROXY, 1, c->host_port);
1048     if (c->charset||c->lang)
1049     {
1050         Z_OtherInformation **oi;
1051         Z_OtherInformationUnit *oi_unit;
1052
1053         yaz_oi_APDU(apdu, &oi);
1054
1055         if ((oi_unit = yaz_oi_update(oi, c->odr_out, NULL, 0, 0)))
1056         {
1057             ODR_MASK_SET(ireq->options, Z_Options_negotiationModel);
1058
1059             oi_unit->which = Z_OtherInfo_externallyDefinedInfo;
1060             oi_unit->information.externallyDefinedInfo =
1061                 yaz_set_proposal_charneg
1062                 (c->odr_out,
1063                  (const char **)&c->charset, (c->charset) ? 1:0,
1064                  (const char **)&c->lang, (c->lang) ? 1:0, 1);
1065         }
1066     }
1067     assert (apdu);
1068     return send_APDU (c, apdu);
1069 }
1070
1071 #if HAVE_XML2
1072 static zoom_ret send_srw (ZOOM_connection c, Z_SRW_PDU *sr)
1073 {
1074     char ctype[50];
1075     Z_SOAP_Handler h[2] = {
1076         {"http://www.loc.gov/zing/srw/", 0, (Z_SOAP_fun) yaz_srw_codec},
1077         {0, 0, 0}
1078     };
1079     ODR o = odr_createmem(ODR_ENCODE);
1080     int ret;
1081     Z_SOAP *p = odr_malloc(o, sizeof(*p));
1082     Z_GDU *gdu;
1083     ZOOM_Event event;
1084
1085     gdu = z_get_HTTP_Request(c->odr_out);
1086     gdu->u.HTTP_Request->path = c->path;
1087
1088     if (c->host_port)
1089     {
1090         const char *cp0 = strstr(c->host_port, "://");
1091         const char *cp1 = 0;
1092         if (cp0)
1093             cp0 = cp0+3;
1094         else
1095             cp0 = c->host_port;
1096
1097         cp1 = strchr(cp0, '/');
1098         if (!cp1)
1099             cp1 = cp0+strlen(cp0);
1100
1101         if (cp0 && cp1)
1102         {
1103             char *h = odr_malloc(c->odr_out, cp1 - cp0 + 1);
1104             memcpy (h, cp0, cp1 - cp0);
1105             h[cp1-cp0] = '\0';
1106             z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
1107                               "Host", h);
1108         }
1109     }
1110
1111     strcpy(ctype, "text/xml");
1112     if (c->charset && strlen(c->charset) < 20)
1113     {
1114         strcat(ctype, "; charset=");
1115         strcat(ctype, c->charset);
1116     }
1117     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
1118                       "Content-Type", ctype);
1119     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
1120                       "SOAPAction", "\"\"");
1121     p->which = Z_SOAP_generic;
1122     p->u.generic = odr_malloc(o, sizeof(*p->u.generic));
1123     p->u.generic->no = 0;
1124     p->u.generic->ns = 0;
1125     p->u.generic->p = sr;
1126     p->ns = "http://schemas.xmlsoap.org/soap/envelope/";
1127
1128     ret = z_soap_codec_enc(o, &p,
1129                            &gdu->u.HTTP_Request->content_buf,
1130                            &gdu->u.HTTP_Request->content_len, h,
1131                            c->charset);
1132
1133     if (!z_GDU(c->odr_out, &gdu, 0, 0))
1134         return zoom_complete;
1135     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
1136
1137     odr_destroy(o);
1138
1139     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
1140     ZOOM_connection_put_event (c, event);
1141     odr_reset(c->odr_out);
1142     return do_write (c);
1143 }
1144 #endif
1145
1146 #if HAVE_XML2
1147 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1148 {
1149     int i;
1150     ZOOM_resultset resultset = 0;
1151     Z_SRW_PDU *sr = 0;
1152     const char *recordPacking = 0;
1153
1154     if (c->error)                  /* don't continue on error */
1155         return zoom_complete;
1156     assert (c->tasks);
1157     if (c->tasks->which == ZOOM_TASK_SEARCH)
1158     {
1159         resultset = c->tasks->u.search.resultset;
1160         resultset->setname = xstrdup ("default");
1161         ZOOM_options_set (resultset->options, "setname", resultset->setname);
1162     }
1163     else if(c->tasks->which == ZOOM_TASK_RETRIEVE)
1164     {
1165         resultset = c->tasks->u.retrieve.resultset;
1166
1167         resultset->start = c->tasks->u.retrieve.start;
1168         resultset->count = c->tasks->u.retrieve.count;
1169
1170         if (resultset->start >= resultset->size)
1171             return zoom_complete;
1172         if (resultset->start + resultset->count > resultset->size)
1173             resultset->count = resultset->size - resultset->start;
1174
1175         for (i = 0; i<resultset->count; i++)
1176         {
1177             ZOOM_record rec =
1178                 record_cache_lookup (resultset, i + resultset->start);
1179             if (!rec)
1180                 break;
1181         }
1182         if (i == resultset->count)
1183             return zoom_complete;
1184     }
1185     assert(resultset->query);
1186
1187     sr = yaz_srw_get(c->odr_out, Z_SRW_searchRetrieve_request);
1188
1189     if (resultset->query->z_query->which == Z_Query_type_104
1190         && resultset->query->z_query->u.type_104->which == Z_External_CQL)
1191     {
1192
1193         sr->u.request->query_type = Z_SRW_query_type_cql;
1194         sr->u.request->query.cql =resultset->query->z_query->u.type_104->u.cql;
1195     }
1196     else if (resultset->query->z_query->which == Z_Query_type_1 &&
1197              resultset->query->z_query->u.type_1)
1198     {
1199         sr->u.request->query_type = Z_SRW_query_type_pqf;
1200         sr->u.request->query.pqf = resultset->query->query_string;
1201     }
1202     else
1203     {
1204         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_QUERY, 0);
1205         return zoom_complete;
1206     }
1207     sr->u.request->startRecord = odr_intdup (c->odr_out, resultset->start + 1);
1208     sr->u.request->maximumRecords = odr_intdup (
1209         c->odr_out, resultset->step>0 ? resultset->step : resultset->count);
1210     sr->u.request->recordSchema = resultset->schema;
1211
1212     recordPacking = ZOOM_resultset_option_get (resultset, "recordPacking");
1213
1214     if (recordPacking)
1215         sr->u.request->recordPacking = odr_strdup(c->odr_out, recordPacking);
1216
1217     return send_srw(c, sr);
1218 }
1219 #else
1220 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1221 {
1222     return zoom_complete;
1223 }
1224 #endif
1225
1226 static zoom_ret ZOOM_connection_send_search (ZOOM_connection c)
1227 {
1228     ZOOM_resultset r;
1229     int lslb, ssub, mspn;
1230     const char *syntax;
1231     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_searchRequest);
1232     Z_SearchRequest *search_req = apdu->u.searchRequest;
1233     const char *elementSetName;
1234     const char *smallSetElementSetName;
1235     const char *mediumSetElementSetName;
1236
1237     assert (c->tasks);
1238     assert (c->tasks->which == ZOOM_TASK_SEARCH);
1239
1240     r = c->tasks->u.search.resultset;
1241
1242     elementSetName =
1243         ZOOM_options_get (r->options, "elementSetName");
1244     smallSetElementSetName  =
1245         ZOOM_options_get (r->options, "smallSetElementSetName");
1246     mediumSetElementSetName =
1247         ZOOM_options_get (r->options, "mediumSetElementSetName");
1248
1249     if (!smallSetElementSetName)
1250         smallSetElementSetName = elementSetName;
1251
1252     if (!mediumSetElementSetName)
1253         mediumSetElementSetName = elementSetName;
1254
1255     assert (r);
1256     assert (r->query);
1257
1258     /* prepare query for the search request */
1259     search_req->query = r->query->z_query;
1260     if (!search_req->query)
1261     {
1262         set_ZOOM_error(c, ZOOM_ERROR_INVALID_QUERY, 0);
1263         return zoom_complete;
1264     }
1265
1266     search_req->databaseNames =
1267         set_DatabaseNames (c, r->options, &search_req->num_databaseNames);
1268
1269     /* get syntax (no need to provide unless piggyback is in effect) */
1270     syntax = ZOOM_options_get (r->options, "preferredRecordSyntax");
1271
1272     lslb = ZOOM_options_get_int (r->options, "largeSetLowerBound", -1);
1273     ssub = ZOOM_options_get_int (r->options, "smallSetUpperBound", -1);
1274     mspn = ZOOM_options_get_int (r->options, "mediumSetPresentNumber", -1);
1275     if (lslb != -1 && ssub != -1 && mspn != -1)
1276     {
1277         /* So're a Z39.50 expert? Let's hope you don't do sort */
1278         *search_req->largeSetLowerBound = lslb;
1279         *search_req->smallSetUpperBound = ssub;
1280         *search_req->mediumSetPresentNumber = mspn;
1281     }
1282     else if (r->start == 0 && r->count > 0
1283              && r->piggyback && !r->r_sort_spec && !r->schema)
1284     {
1285         /* Regular piggyback - do it unless we're going to do sort */
1286         *search_req->largeSetLowerBound = 2000000000;
1287         *search_req->smallSetUpperBound = 1;
1288         *search_req->mediumSetPresentNumber = r->step>0 ? r->step : r->count;
1289     }
1290     else
1291     {
1292         /* non-piggyback. Need not provide elementsets or syntaxes .. */
1293         smallSetElementSetName = 0;
1294         mediumSetElementSetName = 0;
1295         syntax = 0;
1296     }
1297     if (smallSetElementSetName && *smallSetElementSetName)
1298     {
1299         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1300             odr_malloc (c->odr_out, sizeof(*esn));
1301
1302         esn->which = Z_ElementSetNames_generic;
1303         esn->u.generic = odr_strdup (c->odr_out, smallSetElementSetName);
1304         search_req->smallSetElementSetNames = esn;
1305     }
1306     if (mediumSetElementSetName && *mediumSetElementSetName)
1307     {
1308         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1309             odr_malloc (c->odr_out, sizeof(*esn));
1310
1311         esn->which = Z_ElementSetNames_generic;
1312         esn->u.generic = odr_strdup (c->odr_out, mediumSetElementSetName);
1313         search_req->mediumSetElementSetNames = esn;
1314     }
1315     if (syntax)
1316         search_req->preferredRecordSyntax =
1317             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1318
1319     if (!r->setname)
1320     {
1321         if (c->support_named_resultsets)
1322         {
1323             char setname[14];
1324             int ord;
1325             /* find the lowest unused ordinal so that we re-use
1326                result sets on the server. */
1327             for (ord = 1; ; ord++)
1328             {
1329                 ZOOM_resultset rp;
1330                 sprintf (setname, "%d", ord);
1331                 for (rp = c->resultsets; rp; rp = rp->next)
1332                     if (rp->setname && !strcmp (rp->setname, setname))
1333                         break;
1334                 if (!rp)
1335                     break;
1336             }
1337             r->setname = xstrdup (setname);
1338             yaz_log (LOG_DEBUG, "allocating set %s", r->setname);
1339         }
1340         else
1341             r->setname = xstrdup ("default");
1342         ZOOM_options_set (r->options, "setname", r->setname);
1343     }
1344     search_req->resultSetName = odr_strdup(c->odr_out, r->setname);
1345     /* send search request */
1346     return send_APDU (c, apdu);
1347 }
1348
1349 static void response_diag (ZOOM_connection c, Z_DiagRec *p)
1350 {
1351     int oclass;
1352     Z_DefaultDiagFormat *r;
1353     char *addinfo = 0;
1354
1355     xfree (c->addinfo);
1356     c->addinfo = 0;
1357     if (p->which != Z_DiagRec_defaultFormat)
1358     {
1359         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1360         return;
1361     }
1362     r = p->u.defaultFormat;
1363     switch (r->which)
1364     {
1365     case Z_DefaultDiagFormat_v2Addinfo:
1366         addinfo = r->u.v2Addinfo;
1367         break;
1368     case Z_DefaultDiagFormat_v3Addinfo:
1369         addinfo = r->u.v3Addinfo;
1370         break;
1371     }
1372     set_dset_error(c, *r->condition,
1373                    yaz_z3950oid_to_str(r->diagnosticSetId, &oclass),
1374                    addinfo, 0);
1375 }
1376
1377 ZOOM_API(ZOOM_record)
1378 ZOOM_record_clone (ZOOM_record srec)
1379 {
1380     char *buf;
1381     int size;
1382     ODR odr_enc;
1383     ZOOM_record nrec;
1384
1385     odr_enc = odr_createmem(ODR_ENCODE);
1386     if (!z_NamePlusRecord (odr_enc, &srec->npr, 0, 0))
1387         return 0;
1388     buf = odr_getbuf (odr_enc, &size, 0);
1389
1390     nrec = (ZOOM_record) xmalloc (sizeof(*nrec));
1391     nrec->odr = odr_createmem(ODR_DECODE);
1392     nrec->wrbuf_marc = 0;
1393     nrec->wrbuf_iconv = 0;
1394     nrec->wrbuf_opac = 0;
1395     odr_setbuf (nrec->odr, buf, size, 0);
1396     z_NamePlusRecord (nrec->odr, &nrec->npr, 0, 0);
1397
1398     odr_destroy (odr_enc);
1399     return nrec;
1400 }
1401
1402 ZOOM_API(ZOOM_record)
1403 ZOOM_resultset_record_immediate (ZOOM_resultset s,size_t pos)
1404 {
1405     return record_cache_lookup (s, pos);
1406 }
1407
1408 ZOOM_API(ZOOM_record)
1409 ZOOM_resultset_record (ZOOM_resultset r, size_t pos)
1410 {
1411     ZOOM_record rec = ZOOM_resultset_record_immediate(r, pos);
1412
1413     if (!rec)
1414     {
1415         ZOOM_resultset_retrieve (r, 1, pos, 1);
1416         rec = ZOOM_resultset_record_immediate (r, pos);
1417     }
1418     return rec;
1419 }
1420
1421 ZOOM_API(void)
1422 ZOOM_record_destroy (ZOOM_record rec)
1423 {
1424     if (!rec)
1425         return;
1426     if (rec->wrbuf_marc)
1427         wrbuf_free (rec->wrbuf_marc, 1);
1428     if (rec->wrbuf_iconv)
1429         wrbuf_free (rec->wrbuf_iconv, 1);
1430     if (rec->wrbuf_opac)
1431         wrbuf_free (rec->wrbuf_opac, 1);
1432     odr_destroy (rec->odr);
1433     xfree (rec);
1434 }
1435
1436 static const char *marc_iconv_return(ZOOM_record rec, int marc_type,
1437                                      int *len,
1438                                      const char *buf, int sz,
1439                                      const char *record_charset)
1440 {
1441     char to[40];
1442     char from[40];
1443     yaz_iconv_t cd = 0;
1444     yaz_marc_t mt = yaz_marc_create();
1445
1446     *from = '\0';
1447     strcpy(to, "UTF-8");
1448     if (record_charset && *record_charset)
1449     {
1450         /* Use "from,to" or just "from" */
1451         const char *cp =strchr(record_charset, ',');
1452         int clen = strlen(record_charset);
1453         if (cp && cp[1])
1454         {
1455             strncpy( to, cp+1, sizeof(to)-1);
1456             to[sizeof(to)-1] = '\0';
1457             clen = cp - record_charset;
1458         }
1459         if (clen > sizeof(from)-1)
1460             clen = sizeof(from)-1;
1461
1462         if (clen)
1463             strncpy(from, record_charset, clen);
1464         from[clen] = '\0';
1465     }
1466
1467     if (*from && *to)
1468     {
1469         cd = yaz_iconv_open(to, from);
1470         yaz_marc_iconv(mt, cd);
1471     }
1472
1473     yaz_marc_xml(mt, marc_type);
1474     if (!rec->wrbuf_marc)
1475         rec->wrbuf_marc = wrbuf_alloc();
1476     wrbuf_rewind (rec->wrbuf_marc);
1477     if (yaz_marc_decode_wrbuf (mt, buf, sz, rec->wrbuf_marc) > 0)
1478     {
1479         yaz_marc_destroy(mt);
1480         if (cd)
1481             yaz_iconv_close(cd);
1482         if (len)
1483             *len = wrbuf_len(rec->wrbuf_marc);
1484         return wrbuf_buf(rec->wrbuf_marc);
1485     }
1486     yaz_marc_destroy(mt);
1487     if (cd)
1488         yaz_iconv_close(cd);
1489     return 0;
1490 }
1491
1492 static const char *record_iconv_return(ZOOM_record rec, int *len,
1493                                        const char *buf, int sz,
1494                                        const char *record_charset)
1495 {
1496     char to[40];
1497     char from[40];
1498     yaz_iconv_t cd = 0;
1499
1500     *from = '\0';
1501     strcpy(to, "UTF-8");
1502     if (record_charset && *record_charset)
1503     {
1504         /* Use "from,to" or just "from" */
1505         const char *cp =strchr(record_charset, ',');
1506         int clen = strlen(record_charset);
1507         if (cp && cp[1])
1508         {
1509             strncpy( to, cp+1, sizeof(to)-1);
1510             to[sizeof(to)-1] = '\0';
1511             clen = cp - record_charset;
1512         }
1513         if (clen > sizeof(from)-1)
1514             clen = sizeof(from)-1;
1515
1516         if (clen)
1517             strncpy(from, record_charset, clen);
1518         from[clen] = '\0';
1519     }
1520
1521     if (*from && *to && (cd = yaz_iconv_open(to, from)))
1522     {
1523         char outbuf[12];
1524         size_t inbytesleft = sz;
1525         const char *inp = buf;
1526
1527         if (!rec->wrbuf_iconv)
1528             rec->wrbuf_iconv = wrbuf_alloc();
1529
1530         wrbuf_rewind(rec->wrbuf_iconv);
1531
1532         while (inbytesleft)
1533         {
1534             size_t outbytesleft = sizeof(outbuf);
1535             char *outp = outbuf;
1536             size_t r = yaz_iconv (cd, (char**) &inp,
1537                                   &inbytesleft,
1538                                   &outp, &outbytesleft);
1539             if (r == (size_t) (-1))
1540             {
1541                 int e = yaz_iconv_error(cd);
1542                 if (e != YAZ_ICONV_E2BIG)
1543                     break;
1544             }
1545             wrbuf_write(rec->wrbuf_iconv, outbuf, outp - outbuf);
1546         }
1547         wrbuf_puts(rec->wrbuf_iconv, "");
1548         buf = wrbuf_buf(rec->wrbuf_iconv);
1549         sz = wrbuf_len(rec->wrbuf_iconv);
1550         yaz_iconv_close(cd);
1551     }
1552     if (len)
1553         *len = sz;
1554     return buf;
1555 }
1556
1557 ZOOM_API(const char *)
1558 ZOOM_record_get (ZOOM_record rec, const char *type_spec, int *len)
1559 {
1560     char type[40];
1561     char charset[40];
1562     char xpath[512];
1563     const char *cp;
1564     int i;
1565     Z_NamePlusRecord *npr;
1566
1567     if (len)
1568         *len = 0; /* default return */
1569
1570     if (!rec)
1571         return 0;
1572     npr = rec->npr;
1573     if (!npr)
1574         return 0;
1575
1576     cp = type_spec;
1577     for (i = 0; cp[i] && i < sizeof(type)-1; i++)
1578     {
1579         if (cp[i] == ';' || cp[i] == ' ')
1580             break;
1581         type[i] = cp[i];
1582     }
1583     type[i] = '\0';
1584     charset[0] = '\0';
1585     while (type_spec[i] == ';')
1586     {
1587         i++;
1588         while (type_spec[i] == ' ')
1589             i++;
1590         if (!strncmp(type_spec+i, "charset=", 8))
1591         {
1592             cp = type_spec+i+8;
1593             for (i = 0; cp[i] && i < sizeof(charset)-1; i++)
1594             {
1595                 if (cp[i] == ';' || cp[i] == ' ')
1596                     break;
1597                 charset[i] = cp[i];
1598             }
1599             charset[i] = '\0';
1600         }
1601         else if (!strncmp(type_spec+i, "xpath=", 6))
1602         {
1603             cp = type_spec+i+6;
1604             for (i = 0; cp[i] && i < sizeof(xpath)-1; i++)
1605                 xpath[i] = cp[i];
1606             xpath[i] = '\0';
1607         }
1608         while (type_spec[i] == ' ')
1609             i++;
1610     }
1611     if (!strcmp (type, "database"))
1612     {
1613         if (len)
1614             *len = (npr->databaseName ? strlen(npr->databaseName) : 0);
1615         return npr->databaseName;
1616     }
1617     else if (!strcmp (type, "syntax"))
1618     {
1619         const char *desc = 0;
1620         if (npr->which == Z_NamePlusRecord_databaseRecord)
1621         {
1622             Z_External *r = (Z_External *) npr->u.databaseRecord;
1623             oident *ent = oid_getentbyoid(r->direct_reference);
1624             if (ent)
1625                 desc = ent->desc;
1626         }
1627         if (!desc)
1628             desc = "none";
1629         if (len)
1630             *len = strlen(desc);
1631         return desc;
1632     }
1633     if (npr->which != Z_NamePlusRecord_databaseRecord)
1634         return 0;
1635
1636     /* from now on - we have a database record .. */
1637     if (!strcmp (type, "render"))
1638     {
1639         Z_External *r = (Z_External *) npr->u.databaseRecord;
1640         oident *ent = oid_getentbyoid(r->direct_reference);
1641
1642         /* render bibliographic record .. */
1643         if (r->which == Z_External_OPAC)
1644         {
1645             r = r->u.opac->bibliographicRecord;
1646             if (!r)
1647                 return 0;
1648             ent = oid_getentbyoid(r->direct_reference);
1649         }
1650         if (r->which == Z_External_sutrs)
1651             return record_iconv_return(rec, len,
1652                                        r->u.sutrs->buf, r->u.sutrs->len,
1653                                        charset);
1654         else if (r->which == Z_External_octet)
1655         {
1656             const char *ret_buf;
1657             switch (ent->value)
1658             {
1659             case VAL_SOIF:
1660             case VAL_HTML:
1661             case VAL_SUTRS:
1662                 break;
1663             case VAL_TEXT_XML:
1664             case VAL_APPLICATION_XML:
1665                 break;
1666             default:
1667                 ret_buf = marc_iconv_return(
1668                     rec, YAZ_MARC_LINE, len,
1669                     (const char *) r->u.octet_aligned->buf,
1670                     r->u.octet_aligned->len,
1671                     charset);
1672                 if (ret_buf)
1673                     return ret_buf;
1674             }
1675             return record_iconv_return(rec, len,
1676                                        (const char *) r->u.octet_aligned->buf,
1677                                        r->u.octet_aligned->len,
1678                                        charset);
1679         }
1680         else if (r->which == Z_External_grs1)
1681         {
1682             if (!rec->wrbuf_marc)
1683                 rec->wrbuf_marc = wrbuf_alloc();
1684             wrbuf_rewind (rec->wrbuf_marc);
1685             yaz_display_grs1(rec->wrbuf_marc, r->u.grs1, 0);
1686             return record_iconv_return(rec, len,
1687                                        wrbuf_buf(rec->wrbuf_marc),
1688                                        wrbuf_len(rec->wrbuf_marc),
1689                                        charset);
1690         }
1691         return 0;
1692     }
1693     else if (!strcmp (type, "xml") || !strcmp(type, "oai"))
1694     {
1695         Z_External *r = (Z_External *) npr->u.databaseRecord;
1696         oident *ent = oid_getentbyoid(r->direct_reference);
1697
1698         /* render bibliographic record .. */
1699         if (r->which == Z_External_OPAC)
1700         {
1701             r = r->u.opac->bibliographicRecord;
1702             if (!r)
1703                 return 0;
1704             ent = oid_getentbyoid(r->direct_reference);
1705         }
1706
1707         if (r->which == Z_External_sutrs)
1708             return record_iconv_return(rec, len,
1709                                        (const char *) r->u.sutrs->buf,
1710                                        r->u.sutrs->len,
1711                                        charset);
1712         else if (r->which == Z_External_octet)
1713         {
1714             const char *ret_buf;
1715             int marc_decode_type = YAZ_MARC_MARCXML;
1716
1717             if (!strcmp(type, "oai"))
1718                 marc_decode_type = YAZ_MARC_OAIMARC;
1719             switch (ent->value)
1720             {
1721             case VAL_SOIF:
1722             case VAL_HTML:
1723             case VAL_SUTRS:
1724                 break;
1725             case VAL_TEXT_XML:
1726             case VAL_APPLICATION_XML:
1727                 break;
1728             default:
1729                 ret_buf = marc_iconv_return(
1730                     rec, marc_decode_type, len,
1731                     (const char *) r->u.octet_aligned->buf,
1732                     r->u.octet_aligned->len,
1733                     charset);
1734                 if (ret_buf)
1735                     return ret_buf;
1736             }
1737             return record_iconv_return(rec, len,
1738                                        (const char *) r->u.octet_aligned->buf,
1739                                        r->u.octet_aligned->len,
1740                                        charset);
1741         }
1742         else if (r->which == Z_External_grs1)
1743         {
1744             if (len) *len = 5;
1745             return "GRS-1";
1746         }
1747         return 0;
1748     }
1749     else if (!strcmp (type, "raw"))
1750     {
1751         Z_External *r = (Z_External *) npr->u.databaseRecord;
1752
1753         if (r->which == Z_External_sutrs)
1754         {
1755             if (len) *len = r->u.sutrs->len;
1756             return (const char *) r->u.sutrs->buf;
1757         }
1758         else if (r->which == Z_External_octet)
1759         {
1760             if (len) *len = r->u.octet_aligned->len;
1761             return (const char *) r->u.octet_aligned->buf;
1762         }
1763         else /* grs-1, explain, OPAC, ... */
1764         {
1765             if (len) *len = -1;
1766             return (const char *) npr->u.databaseRecord;
1767         }
1768         return 0;
1769     }
1770     else if (!strcmp (type, "ext"))
1771     {
1772         if (len) *len = -1;
1773         return (const char *) npr->u.databaseRecord;
1774     }
1775     else if (!strcmp (type, "opac"))
1776
1777     {
1778         Z_External *r = (Z_External *) npr->u.databaseRecord;
1779         if (r->which == Z_External_OPAC)
1780         {
1781             if (!rec->wrbuf_opac)
1782                 rec->wrbuf_opac = wrbuf_alloc();
1783             wrbuf_rewind (rec->wrbuf_opac);
1784             yaz_display_OPAC(rec->wrbuf_opac, r->u.opac, 0);
1785             return record_iconv_return(rec, len,
1786                                        wrbuf_buf(rec->wrbuf_opac),
1787                                        wrbuf_len(rec->wrbuf_opac),
1788                                        charset);
1789         }
1790     }
1791     return 0;
1792 }
1793
1794 static int strcmp_null(const char *v1, const char *v2)
1795 {
1796     if (!v1 && !v2)
1797         return 0;
1798     if (!v1 || !v2)
1799         return -1;
1800     return strcmp(v1, v2);
1801 }
1802
1803 static void record_cache_add (ZOOM_resultset r, Z_NamePlusRecord *npr,
1804                               int pos)
1805 {
1806     ZOOM_record_cache rc;
1807     const char *elementSetName =
1808         ZOOM_resultset_option_get (r, "elementSetName");
1809     const char *syntax =
1810         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1811
1812     ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_RECV_RECORD);
1813     ZOOM_connection_put_event(r->connection, event);
1814
1815     for (rc = r->record_cache; rc; rc = rc->next)
1816     {
1817         if (pos == rc->pos)
1818         {
1819             if (strcmp_null(r->schema, rc->schema))
1820                 continue;
1821             if (strcmp_null(elementSetName,rc->elementSetName))
1822                 continue;
1823             if (strcmp_null(syntax, rc->syntax))
1824                 continue;
1825             /* not destroying rc->npr (it's handled by nmem )*/
1826             rc->rec.npr = npr;
1827             /* keeping wrbuf_marc too */
1828             return;
1829         }
1830     }
1831     rc = (ZOOM_record_cache) odr_malloc (r->odr, sizeof(*rc));
1832     rc->rec.npr = npr;
1833     rc->rec.odr = 0;
1834     rc->rec.wrbuf_marc = 0;
1835     rc->rec.wrbuf_iconv = 0;
1836     rc->rec.wrbuf_opac = 0;
1837     if (elementSetName)
1838         rc->elementSetName = odr_strdup (r->odr, elementSetName);
1839     else
1840         rc->elementSetName = 0;
1841
1842     if (syntax)
1843         rc->syntax = odr_strdup (r->odr, syntax);
1844     else
1845         rc->syntax = 0;
1846
1847     if (r->schema)
1848         rc->schema = odr_strdup (r->odr, r->schema);
1849     else
1850         rc->schema = 0;
1851
1852     rc->pos = pos;
1853     rc->next = r->record_cache;
1854     r->record_cache = rc;
1855 }
1856
1857 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos)
1858 {
1859     ZOOM_record_cache rc;
1860     const char *elementSetName =
1861         ZOOM_resultset_option_get (r, "elementSetName");
1862     const char *syntax =
1863         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1864
1865     for (rc = r->record_cache; rc; rc = rc->next)
1866     {
1867         if (pos == rc->pos)
1868         {
1869             if (strcmp_null(r->schema, rc->schema))
1870                 continue;
1871             if (strcmp_null(elementSetName,rc->elementSetName))
1872                 continue;
1873             if (strcmp_null(syntax, rc->syntax))
1874                 continue;
1875             return &rc->rec;
1876         }
1877     }
1878     return 0;
1879 }
1880
1881 static void handle_records (ZOOM_connection c, Z_Records *sr,
1882                             int present_phase)
1883 {
1884     ZOOM_resultset resultset;
1885
1886     if (!c->tasks)
1887         return ;
1888     switch (c->tasks->which)
1889     {
1890     case ZOOM_TASK_SEARCH:
1891         resultset = c->tasks->u.search.resultset;
1892         break;
1893     case ZOOM_TASK_RETRIEVE:
1894         resultset = c->tasks->u.retrieve.resultset;
1895         break;
1896     default:
1897         return;
1898     }
1899     if (sr && sr->which == Z_Records_NSD)
1900     {
1901         Z_DiagRec dr, *dr_p = &dr;
1902         dr.which = Z_DiagRec_defaultFormat;
1903         dr.u.defaultFormat = sr->u.nonSurrogateDiagnostic;
1904
1905         response_diag (c, dr_p);
1906     }
1907     else if (sr && sr->which == Z_Records_multipleNSD)
1908     {
1909         if (sr->u.multipleNonSurDiagnostics->num_diagRecs >= 1)
1910             response_diag(c, sr->u.multipleNonSurDiagnostics->diagRecs[0]);
1911         else
1912             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1913     }
1914     else
1915     {
1916         if (resultset->count + resultset->start > resultset->size)
1917             resultset->count = resultset->size - resultset->start;
1918         if (resultset->count < 0)
1919             resultset->count = 0;
1920         if (sr && sr->which == Z_Records_DBOSD)
1921         {
1922             int i;
1923             NMEM nmem = odr_extract_mem (c->odr_in);
1924             Z_NamePlusRecordList *p =
1925                 sr->u.databaseOrSurDiagnostics;
1926             for (i = 0; i<p->num_records; i++)
1927             {
1928                 record_cache_add (resultset, p->records[i],
1929                                   i+ resultset->start);
1930             }
1931             /* transfer our response to search_nmem .. we need it later */
1932             nmem_transfer (resultset->odr->mem, nmem);
1933             nmem_destroy (nmem);
1934             if (present_phase && p->num_records == 0)
1935             {
1936                 /* present response and we didn't get any records! */
1937                 set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1938             }
1939         }
1940         else if (present_phase)
1941         {
1942             /* present response and we didn't get any records! */
1943             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1944         }
1945     }
1946 }
1947
1948 static void handle_present_response (ZOOM_connection c, Z_PresentResponse *pr)
1949 {
1950     handle_records (c, pr->records, 1);
1951 }
1952
1953 static void handle_search_response (ZOOM_connection c, Z_SearchResponse *sr)
1954 {
1955     ZOOM_resultset resultset;
1956     ZOOM_Event event;
1957
1958     yaz_log (LOG_DEBUG, "got search response");
1959
1960     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1961         return ;
1962
1963     event = ZOOM_Event_create(ZOOM_EVENT_RECV_SEARCH);
1964     ZOOM_connection_put_event(c, event);
1965
1966     resultset = c->tasks->u.search.resultset;
1967
1968     resultset->size = *sr->resultCount;
1969     handle_records (c, sr->records, 0);
1970 }
1971
1972 static void sort_response (ZOOM_connection c, Z_SortResponse *res)
1973 {
1974     if (res->diagnostics && res->num_diagnostics > 0)
1975         response_diag (c, res->diagnostics[0]);
1976 }
1977
1978 static int scan_response (ZOOM_connection c, Z_ScanResponse *res)
1979 {
1980     NMEM nmem = odr_extract_mem (c->odr_in);
1981     ZOOM_scanset scan;
1982
1983     if (!c->tasks || c->tasks->which != ZOOM_TASK_SCAN)
1984         return 0;
1985     scan = c->tasks->u.scan.scan;
1986
1987     if (res->entries && res->entries->nonsurrogateDiagnostics)
1988         response_diag(c, res->entries->nonsurrogateDiagnostics[0]);
1989     scan->scan_response = res;
1990     nmem_transfer (scan->odr->mem, nmem);
1991     if (res->stepSize)
1992         ZOOM_options_set_int (scan->options, "stepSize", *res->stepSize);
1993     if (res->positionOfTerm)
1994         ZOOM_options_set_int (scan->options, "position", *res->positionOfTerm);
1995     if (res->scanStatus)
1996         ZOOM_options_set_int (scan->options, "scanStatus", *res->scanStatus);
1997     if (res->numberOfEntriesReturned)
1998         ZOOM_options_set_int (scan->options, "number",
1999                               *res->numberOfEntriesReturned);
2000     nmem_destroy (nmem);
2001     return 1;
2002 }
2003
2004 static zoom_ret send_sort (ZOOM_connection c,
2005                            ZOOM_resultset resultset)
2006 {
2007     if (c->error)
2008         resultset->r_sort_spec = 0;
2009     if (resultset->r_sort_spec)
2010     {
2011         Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_sortRequest);
2012         Z_SortRequest *req = apdu->u.sortRequest;
2013
2014         req->num_inputResultSetNames = 1;
2015         req->inputResultSetNames = (Z_InternationalString **)
2016             odr_malloc (c->odr_out, sizeof(*req->inputResultSetNames));
2017         req->inputResultSetNames[0] =
2018             odr_strdup (c->odr_out, resultset->setname);
2019         req->sortedResultSetName = odr_strdup (c->odr_out, resultset->setname);
2020         req->sortSequence = resultset->r_sort_spec;
2021         resultset->r_sort_spec = 0;
2022         return send_APDU (c, apdu);
2023     }
2024     return zoom_complete;
2025 }
2026
2027 static zoom_ret send_present (ZOOM_connection c)
2028 {
2029     Z_APDU *apdu = 0;
2030     Z_PresentRequest *req = 0;
2031     int i = 0;
2032     const char *syntax = 0;
2033     const char *elementSetName = 0;
2034     ZOOM_resultset  resultset;
2035
2036     if (!c->tasks)
2037         return zoom_complete;
2038
2039     switch (c->tasks->which)
2040     {
2041     case ZOOM_TASK_SEARCH:
2042         resultset = c->tasks->u.search.resultset;
2043         break;
2044     case ZOOM_TASK_RETRIEVE:
2045         resultset = c->tasks->u.retrieve.resultset;
2046         resultset->start = c->tasks->u.retrieve.start;
2047         resultset->count = c->tasks->u.retrieve.count;
2048
2049         if (resultset->start >= resultset->size)
2050             return zoom_complete;
2051         if (resultset->start + resultset->count > resultset->size)
2052             resultset->count = resultset->size - resultset->start;
2053         break;
2054     default:
2055         return zoom_complete;
2056     }
2057
2058     syntax = ZOOM_resultset_option_get (resultset, "preferredRecordSyntax");
2059     elementSetName = ZOOM_resultset_option_get (resultset, "elementSetName");
2060
2061     if (c->error)                  /* don't continue on error */
2062         return zoom_complete;
2063     if (resultset->start < 0)
2064         return zoom_complete;
2065     for (i = 0; i<resultset->count; i++)
2066     {
2067         ZOOM_record rec =
2068             record_cache_lookup (resultset, i + resultset->start);
2069         if (!rec)
2070             break;
2071     }
2072     if (i == resultset->count)
2073         return zoom_complete;
2074
2075     apdu = zget_APDU(c->odr_out, Z_APDU_presentRequest);
2076     req = apdu->u.presentRequest;
2077
2078     resultset->start += i;
2079     resultset->count -= i;
2080     *req->resultSetStartPoint = resultset->start + 1;
2081     *req->numberOfRecordsRequested = resultset->step>0 ?
2082         resultset->step : resultset->count;
2083     assert (*req->numberOfRecordsRequested > 0);
2084
2085     if (syntax && *syntax)
2086         req->preferredRecordSyntax =
2087             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
2088
2089     if (resultset->schema && *resultset->schema)
2090     {
2091         Z_RecordComposition *compo = (Z_RecordComposition *)
2092             odr_malloc (c->odr_out, sizeof(*compo));
2093
2094         req->recordComposition = compo;
2095         compo->which = Z_RecordComp_complex;
2096         compo->u.complex = (Z_CompSpec *)
2097             odr_malloc(c->odr_out, sizeof(*compo->u.complex));
2098         compo->u.complex->selectAlternativeSyntax = (bool_t *)
2099             odr_malloc(c->odr_out, sizeof(bool_t));
2100         *compo->u.complex->selectAlternativeSyntax = 0;
2101
2102         compo->u.complex->generic = (Z_Specification *)
2103             odr_malloc(c->odr_out, sizeof(*compo->u.complex->generic));
2104
2105         compo->u.complex->generic->which = Z_Schema_oid;
2106         compo->u.complex->generic->schema.oid = (Odr_oid *)
2107             yaz_str_to_z3950oid (c->odr_out, CLASS_SCHEMA, resultset->schema);
2108
2109         if (!compo->u.complex->generic->schema.oid)
2110         {
2111             /* OID wasn't a schema! Try record syntax instead. */
2112
2113             compo->u.complex->generic->schema.oid = (Odr_oid *)
2114                 yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, resultset->schema);
2115         }
2116         if (elementSetName && *elementSetName)
2117         {
2118             compo->u.complex->generic->elementSpec = (Z_ElementSpec *)
2119                 odr_malloc(c->odr_out, sizeof(Z_ElementSpec));
2120             compo->u.complex->generic->elementSpec->which =
2121                 Z_ElementSpec_elementSetName;
2122             compo->u.complex->generic->elementSpec->u.elementSetName =
2123                 odr_strdup (c->odr_out, elementSetName);
2124         }
2125         else
2126             compo->u.complex->generic->elementSpec = 0;
2127         compo->u.complex->num_dbSpecific = 0;
2128         compo->u.complex->dbSpecific = 0;
2129         compo->u.complex->num_recordSyntax = 0;
2130         compo->u.complex->recordSyntax = 0;
2131     }
2132     else if (elementSetName && *elementSetName)
2133     {
2134         Z_ElementSetNames *esn = (Z_ElementSetNames *)
2135             odr_malloc (c->odr_out, sizeof(*esn));
2136         Z_RecordComposition *compo = (Z_RecordComposition *)
2137             odr_malloc (c->odr_out, sizeof(*compo));
2138
2139         esn->which = Z_ElementSetNames_generic;
2140         esn->u.generic = odr_strdup (c->odr_out, elementSetName);
2141         compo->which = Z_RecordComp_simple;
2142         compo->u.simple = esn;
2143         req->recordComposition = compo;
2144     }
2145     req->resultSetId = odr_strdup(c->odr_out, resultset->setname);
2146     return send_APDU (c, apdu);
2147 }
2148
2149 ZOOM_API(ZOOM_scanset)
2150 ZOOM_connection_scan (ZOOM_connection c, const char *start)
2151 {
2152     ZOOM_scanset scan = (ZOOM_scanset) xmalloc (sizeof(*scan));
2153
2154     scan->connection = c;
2155     scan->odr = odr_createmem (ODR_DECODE);
2156     scan->options = ZOOM_options_create_with_parent (c->options);
2157     scan->refcount = 1;
2158     scan->scan_response = 0;
2159
2160     if ((scan->termListAndStartPoint =
2161          p_query_scan(scan->odr, PROTO_Z3950, &scan->attributeSet,
2162                       start)))
2163     {
2164         ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_SCAN);
2165         task->u.scan.scan = scan;
2166
2167         (scan->refcount)++;
2168         if (!c->async)
2169         {
2170             while (ZOOM_event (1, &c))
2171                 ;
2172         }
2173     }
2174     return scan;
2175 }
2176
2177 ZOOM_API(void)
2178 ZOOM_scanset_destroy (ZOOM_scanset scan)
2179 {
2180     if (!scan)
2181         return;
2182     (scan->refcount)--;
2183     if (scan->refcount == 0)
2184     {
2185         odr_destroy (scan->odr);
2186
2187         ZOOM_options_destroy (scan->options);
2188         xfree (scan);
2189     }
2190 }
2191
2192 static zoom_ret send_package (ZOOM_connection c)
2193 {
2194     ZOOM_Event event;
2195     if (!c->tasks)
2196         return zoom_complete;
2197     assert (c->tasks->which == ZOOM_TASK_PACKAGE);
2198
2199     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
2200     ZOOM_connection_put_event (c, event);
2201
2202     return do_write_ex (c, c->tasks->u.package->buf_out,
2203                         c->tasks->u.package->len_out);
2204 }
2205
2206 static zoom_ret send_scan (ZOOM_connection c)
2207 {
2208     ZOOM_scanset scan;
2209     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_scanRequest);
2210     Z_ScanRequest *req = apdu->u.scanRequest;
2211     if (!c->tasks)
2212         return zoom_complete;
2213     assert (c->tasks->which == ZOOM_TASK_SCAN);
2214     scan = c->tasks->u.scan.scan;
2215
2216     req->termListAndStartPoint = scan->termListAndStartPoint;
2217     req->attributeSet = scan->attributeSet;
2218
2219     *req->numberOfTermsRequested =
2220         ZOOM_options_get_int(scan->options, "number", 10);
2221
2222     req->preferredPositionInResponse =
2223         odr_intdup (c->odr_out,
2224                     ZOOM_options_get_int(scan->options, "position", 1));
2225
2226     req->stepSize =
2227         odr_intdup (c->odr_out,
2228                     ZOOM_options_get_int(scan->options, "stepSize", 0));
2229
2230     req->databaseNames = set_DatabaseNames (c, scan->options,
2231                                             &req->num_databaseNames);
2232
2233     return send_APDU (c, apdu);
2234 }
2235
2236 ZOOM_API(size_t)
2237 ZOOM_scanset_size (ZOOM_scanset scan)
2238 {
2239     if (!scan || !scan->scan_response || !scan->scan_response->entries)
2240         return 0;
2241     return scan->scan_response->entries->num_entries;
2242 }
2243
2244 ZOOM_API(const char *)
2245 ZOOM_scanset_term (ZOOM_scanset scan, size_t pos,
2246                    int *occ, int *len)
2247 {
2248     const char *term = 0;
2249     size_t noent = ZOOM_scanset_size (scan);
2250     Z_ScanResponse *res = scan->scan_response;
2251
2252     *len = 0;
2253     *occ = 0;
2254     if (pos >= noent)
2255         return 0;
2256     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
2257     {
2258         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
2259
2260         if (t->term->which == Z_Term_general)
2261         {
2262             term = (const char *) t->term->u.general->buf;
2263             *len = t->term->u.general->len;
2264         }
2265         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
2266     }
2267     return term;
2268 }
2269
2270 ZOOM_API(const char *)
2271 ZOOM_scanset_display_term (ZOOM_scanset scan, size_t pos,
2272                            int *occ, int *len)
2273 {
2274     const char *term = 0;
2275     size_t noent = ZOOM_scanset_size (scan);
2276     Z_ScanResponse *res = scan->scan_response;
2277
2278     *len = 0;
2279     *occ = 0;
2280     if (pos >= noent)
2281         return 0;
2282     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
2283     {
2284         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
2285
2286         if (t->displayTerm)
2287         {
2288             term = t->displayTerm;
2289             *len = strlen(term);
2290         }
2291         else if (t->term->which == Z_Term_general)
2292         {
2293             term = (const char *) t->term->u.general->buf;
2294             *len = t->term->u.general->len;
2295         }
2296         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
2297     }
2298     return term;
2299 }
2300
2301 ZOOM_API(const char *)
2302 ZOOM_scanset_option_get (ZOOM_scanset scan, const char *key)
2303 {
2304     return ZOOM_options_get (scan->options, key);
2305 }
2306
2307 ZOOM_API(void)
2308 ZOOM_scanset_option_set (ZOOM_scanset scan, const char *key,
2309                               const char *val)
2310 {
2311     ZOOM_options_set (scan->options, key, val);
2312 }
2313
2314 static Z_APDU *create_es_package (ZOOM_package p, int type)
2315 {
2316     const char *str;
2317     Z_APDU *apdu = zget_APDU(p->odr_out, Z_APDU_extendedServicesRequest);
2318     Z_ExtendedServicesRequest *req = apdu->u.extendedServicesRequest;
2319
2320     *req->function = Z_ExtendedServicesRequest_create;
2321
2322     str = ZOOM_options_get(p->options, "package-name");
2323     if (str && *str)
2324         req->packageName = nmem_strdup (p->odr_out->mem, str);
2325
2326     str = ZOOM_options_get(p->options, "user-id");
2327     if (str)
2328         req->userId = nmem_strdup (p->odr_out->mem, str);
2329
2330     req->packageType = yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2331                                               type);
2332
2333     str = ZOOM_options_get(p->options, "function");
2334     if (str)
2335     {
2336         if (!strcmp (str, "create"))
2337             *req->function = 1;
2338         if (!strcmp (str, "delete"))
2339             *req->function = 2;
2340         if (!strcmp (str, "modify"))
2341             *req->function = 3;
2342     }
2343     return apdu;
2344 }
2345
2346 static const char *ill_array_lookup (void *clientData, const char *idx)
2347 {
2348     ZOOM_package p = (ZOOM_package) clientData;
2349     return ZOOM_options_get (p->options, idx+4);
2350 }
2351
2352 static Z_External *encode_ill_request (ZOOM_package p)
2353 {
2354     ODR out = p->odr_out;
2355     ILL_Request *req;
2356     Z_External *r = 0;
2357     struct ill_get_ctl ctl;
2358
2359     ctl.odr = p->odr_out;
2360     ctl.clientData = p;
2361     ctl.f = ill_array_lookup;
2362
2363     req = ill_get_ILLRequest(&ctl, "ill", 0);
2364
2365     if (!ill_Request (out, &req, 0, 0))
2366     {
2367         int ill_request_size;
2368         char *ill_request_buf = odr_getbuf (out, &ill_request_size, 0);
2369         if (ill_request_buf)
2370             odr_setbuf (out, ill_request_buf, ill_request_size, 1);
2371         return 0;
2372     }
2373     else
2374     {
2375         oident oid;
2376         int illRequest_size = 0;
2377         char *illRequest_buf = odr_getbuf (out, &illRequest_size, 0);
2378
2379         oid.proto = PROTO_GENERAL;
2380         oid.oclass = CLASS_GENERAL;
2381         oid.value = VAL_ISO_ILL_1;
2382
2383         r = (Z_External *) odr_malloc (out, sizeof(*r));
2384         r->direct_reference = odr_oiddup(out,oid_getoidbyent(&oid));
2385         r->indirect_reference = 0;
2386         r->descriptor = 0;
2387         r->which = Z_External_single;
2388
2389         r->u.single_ASN1_type = (Odr_oct *)
2390             odr_malloc (out, sizeof(*r->u.single_ASN1_type));
2391         r->u.single_ASN1_type->buf = (unsigned char*)
2392             odr_malloc (out, illRequest_size);
2393         r->u.single_ASN1_type->len = illRequest_size;
2394         r->u.single_ASN1_type->size = illRequest_size;
2395         memcpy (r->u.single_ASN1_type->buf, illRequest_buf, illRequest_size);
2396     }
2397     return r;
2398 }
2399
2400 static Z_ItemOrder *encode_item_order(ZOOM_package p)
2401 {
2402     Z_ItemOrder *req = (Z_ItemOrder *) odr_malloc (p->odr_out, sizeof(*req));
2403     const char *str;
2404
2405     req->which=Z_IOItemOrder_esRequest;
2406     req->u.esRequest = (Z_IORequest *)
2407         odr_malloc(p->odr_out,sizeof(Z_IORequest));
2408
2409     /* to keep part ... */
2410     req->u.esRequest->toKeep = (Z_IOOriginPartToKeep *)
2411         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartToKeep));
2412     req->u.esRequest->toKeep->supplDescription = 0;
2413     req->u.esRequest->toKeep->contact = (Z_IOContact *)
2414         odr_malloc (p->odr_out, sizeof(*req->u.esRequest->toKeep->contact));
2415
2416     str = ZOOM_options_get(p->options, "contact-name");
2417     req->u.esRequest->toKeep->contact->name = str ?
2418         nmem_strdup (p->odr_out->mem, str) : 0;
2419
2420     str = ZOOM_options_get(p->options, "contact-phone");
2421     req->u.esRequest->toKeep->contact->phone = str ?
2422         nmem_strdup (p->odr_out->mem, str) : 0;
2423
2424     str = ZOOM_options_get(p->options, "contact-email");
2425     req->u.esRequest->toKeep->contact->email = str ?
2426         nmem_strdup (p->odr_out->mem, str) : 0;
2427
2428     req->u.esRequest->toKeep->addlBilling = 0;
2429
2430     /* not to keep part ... */
2431     req->u.esRequest->notToKeep = (Z_IOOriginPartNotToKeep *)
2432         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartNotToKeep));
2433
2434     str = ZOOM_options_get(p->options, "itemorder-setname");
2435     if (!str)
2436         str = "default";
2437
2438     if (!*str)
2439         req->u.esRequest->notToKeep->resultSetItem = 0;
2440     else
2441     {
2442         req->u.esRequest->notToKeep->resultSetItem = (Z_IOResultSetItem *)
2443            odr_malloc(p->odr_out, sizeof(Z_IOResultSetItem));
2444
2445         req->u.esRequest->notToKeep->resultSetItem->resultSetId =
2446            nmem_strdup (p->odr_out->mem, str);
2447         req->u.esRequest->notToKeep->resultSetItem->item =
2448             (int *) odr_malloc(p->odr_out, sizeof(int));
2449
2450         str = ZOOM_options_get(p->options, "itemorder-item");
2451         *req->u.esRequest->notToKeep->resultSetItem->item =
2452             (str ? atoi(str) : 1);
2453     }
2454     req->u.esRequest->notToKeep->itemRequest = encode_ill_request(p);
2455
2456     return req;
2457 }
2458
2459 Z_APDU *create_admin_package(ZOOM_package p, int type,
2460                              Z_ESAdminOriginPartToKeep **toKeepP,
2461                              Z_ESAdminOriginPartNotToKeep **notToKeepP)
2462 {
2463     Z_APDU *apdu = create_es_package (p, VAL_ADMINSERVICE);
2464     if (apdu)
2465     {
2466         Z_ESAdminOriginPartToKeep  *toKeep;
2467         Z_ESAdminOriginPartNotToKeep  *notToKeep;
2468         Z_External *r = (Z_External *) odr_malloc (p->odr_out, sizeof(*r));
2469         const char *first_db = "Default";
2470         int num_db;
2471         char **db = set_DatabaseNames(p->connection, p->options, &num_db);
2472         if (num_db > 0)
2473             first_db = db[0];
2474
2475         r->direct_reference =
2476             yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2477                                    VAL_ADMINSERVICE);
2478         r->descriptor = 0;
2479         r->indirect_reference = 0;
2480         r->which = Z_External_ESAdmin;
2481
2482         r->u.adminService = (Z_Admin *)
2483             odr_malloc(p->odr_out, sizeof(*r->u.adminService));
2484         r->u.adminService->which = Z_Admin_esRequest;
2485         r->u.adminService->u.esRequest = (Z_AdminEsRequest *)
2486             odr_malloc(p->odr_out, sizeof(*r->u.adminService->u.esRequest));
2487
2488         toKeep = r->u.adminService->u.esRequest->toKeep =
2489             (Z_ESAdminOriginPartToKeep *)
2490             odr_malloc(p->odr_out, sizeof(*r->u.adminService->u.esRequest->toKeep));
2491         toKeep->which=type;
2492         toKeep->databaseName = odr_strdup(p->odr_out, first_db);
2493         toKeep->u.create=odr_nullval();
2494         apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2495
2496         r->u.adminService->u.esRequest->notToKeep = notToKeep =
2497             (Z_ESAdminOriginPartNotToKeep *)
2498             odr_malloc(p->odr_out,
2499                        sizeof(*r->u.adminService->u.esRequest->notToKeep));
2500         notToKeep->which=Z_ESAdminOriginPartNotToKeep_recordsWillFollow;
2501         notToKeep->u.recordsWillFollow=odr_nullval();
2502         if (toKeepP)
2503             *toKeepP = toKeep;
2504         if (notToKeepP)
2505             *notToKeepP = notToKeep;
2506     }
2507     return apdu;
2508 }
2509
2510 static Z_APDU *create_update_package(ZOOM_package p)
2511 {
2512     Z_APDU *apdu = 0;
2513     const char *first_db = "Default";
2514     int num_db;
2515     char **db = set_DatabaseNames(p->connection, p->options, &num_db);
2516     const char *action = ZOOM_options_get(p->options, "action");
2517     const char *recordIdOpaque = ZOOM_options_get(p->options, "recordIdOpaque");
2518     const char *recordIdNumber = ZOOM_options_get(p->options, "recordIdNumber");
2519     const char *record_buf = ZOOM_options_get(p->options, "record");
2520     const char *syntax_str = ZOOM_options_get(p->options, "syntax");
2521     int syntax_oid = VAL_NONE;
2522     int action_no = -1;
2523
2524     if (syntax_str)
2525         syntax_oid = oid_getvalbyname(syntax_str);
2526     if (!record_buf)
2527     {
2528         record_buf = "void";
2529         syntax_oid = VAL_SUTRS;
2530     }
2531     if (syntax_oid != VAL_NONE)
2532         syntax_oid = VAL_TEXT_XML;
2533
2534     if (num_db > 0)
2535         first_db = db[0];
2536
2537     if (!action)
2538         action = "specialUpdate";
2539
2540     if (!strcmp(action, "recordInsert"))
2541         action_no = Z_IUOriginPartToKeep_recordInsert;
2542     else if (!strcmp(action, "recordReplace"))
2543         action_no = Z_IUOriginPartToKeep_recordReplace;
2544     else if (!strcmp(action, "recordDelete"))
2545         action_no = Z_IUOriginPartToKeep_recordDelete;
2546     else if (!strcmp(action, "elementUpdate"))
2547         action_no = Z_IUOriginPartToKeep_elementUpdate;
2548     else if (!strcmp(action, "specialUpdate"))
2549         action_no = Z_IUOriginPartToKeep_specialUpdate;
2550     else
2551         return 0;
2552
2553     apdu = create_es_package (p, VAL_DBUPDATE);
2554     if (apdu)
2555     {
2556         Z_IUOriginPartToKeep *toKeep;
2557         Z_IUSuppliedRecords *notToKeep;
2558         Z_External *r = (Z_External *)
2559             odr_malloc (p->odr_out, sizeof(*r));
2560
2561         apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2562
2563         r->direct_reference =
2564             yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2565                                    VAL_DBUPDATE);
2566         r->descriptor = 0;
2567         r->which = Z_External_update;
2568         r->indirect_reference = 0;
2569         r->u.update = (Z_IUUpdate *)
2570             odr_malloc(p->odr_out, sizeof(*r->u.update));
2571
2572         r->u.update->which = Z_IUUpdate_esRequest;
2573         r->u.update->u.esRequest = (Z_IUUpdateEsRequest *)
2574             odr_malloc(p->odr_out, sizeof(*r->u.update->u.esRequest));
2575         toKeep = r->u.update->u.esRequest->toKeep =
2576             (Z_IUOriginPartToKeep *)
2577             odr_malloc(p->odr_out, sizeof(*toKeep));
2578
2579         toKeep->databaseName = odr_strdup(p->odr_out, first_db);
2580         toKeep->schema = 0;
2581         toKeep->elementSetName = 0;
2582         toKeep->actionQualifier = 0;
2583         toKeep->action = odr_intdup(p->odr_out, action_no);
2584
2585         notToKeep = r->u.update->u.esRequest->notToKeep =
2586             (Z_IUSuppliedRecords *)
2587             odr_malloc(p->odr_out, sizeof(*notToKeep));
2588         notToKeep->num = 1;
2589         notToKeep->elements = (Z_IUSuppliedRecords_elem **)
2590             odr_malloc(p->odr_out, sizeof(*notToKeep->elements));
2591         notToKeep->elements[0] = (Z_IUSuppliedRecords_elem *)
2592             odr_malloc(p->odr_out, sizeof(**notToKeep->elements));
2593         notToKeep->elements[0]->which = Z_IUSuppliedRecords_elem_opaque;
2594         if (recordIdOpaque)
2595         {
2596             notToKeep->elements[0]->u.opaque = (Odr_oct *)
2597                 odr_malloc (p->odr_out, sizeof(Odr_oct));
2598             notToKeep->elements[0]->u.opaque->size =
2599                 notToKeep->elements[0]->u.opaque->len = strlen(recordIdOpaque);
2600             notToKeep->elements[0]->u.opaque->buf =
2601                 odr_strdup(p->odr_out, recordIdOpaque);
2602         }
2603         else if (recordIdNumber)
2604         {
2605             notToKeep->elements[0]->which = Z_IUSuppliedRecords_elem_number;
2606
2607             notToKeep->elements[0]->u.number =
2608                 odr_intdup(p->odr_out, atoi(recordIdNumber));
2609         }
2610         else
2611             notToKeep->elements[0]->u.opaque = 0;
2612         notToKeep->elements[0]->supplementalId = 0;
2613         notToKeep->elements[0]->correlationInfo = 0;
2614         notToKeep->elements[0]->record =
2615             z_ext_record(p->odr_out, syntax_oid,
2616                          record_buf, strlen(record_buf));
2617     }
2618     if (0 && apdu)
2619     {
2620        ODR print = odr_createmem(ODR_PRINT);
2621
2622        z_APDU(print, &apdu, 0, 0);
2623        odr_destroy(print);
2624     }
2625     return apdu;
2626 }
2627
2628 ZOOM_API(void)
2629     ZOOM_package_send (ZOOM_package p, const char *type)
2630 {
2631     Z_APDU *apdu = 0;
2632     ZOOM_connection c;
2633     if (!p)
2634         return;
2635     c = p->connection;
2636     odr_reset (p->odr_out);
2637     xfree (p->buf_out);
2638     p->buf_out = 0;
2639     if (!strcmp(type, "itemorder"))
2640     {
2641         apdu = create_es_package (p, VAL_ITEMORDER);
2642         if (apdu)
2643         {
2644             Z_External *r = (Z_External *) odr_malloc (p->odr_out, sizeof(*r));
2645
2646             r->direct_reference =
2647                 yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2648                                        VAL_ITEMORDER);
2649             r->descriptor = 0;
2650             r->which = Z_External_itemOrder;
2651             r->indirect_reference = 0;
2652             r->u.itemOrder = encode_item_order (p);
2653
2654             apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2655         }
2656     }
2657     if (!strcmp(type, "create"))  /* create database */
2658     {
2659         apdu = create_admin_package(p, Z_ESAdminOriginPartToKeep_create,
2660                                     0, 0);
2661     }
2662     if (!strcmp(type, "drop"))  /* drop database */
2663     {
2664         apdu = create_admin_package(p, Z_ESAdminOriginPartToKeep_drop,
2665                                     0, 0);
2666     }
2667     if (!strcmp(type, "update")) /* update record(s) */
2668     {
2669         apdu = create_update_package(p);
2670     }
2671     if (apdu)
2672     {
2673         if (encode_APDU(p->connection, apdu, p->odr_out) == 0)
2674         {
2675             char *buf;
2676
2677             ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_PACKAGE);
2678             task->u.package = p;
2679             buf = odr_getbuf(p->odr_out, &p->len_out, 0);
2680             p->buf_out = (char *) xmalloc (p->len_out);
2681             memcpy (p->buf_out, buf, p->len_out);
2682
2683             (p->refcount)++;
2684             if (!c->async)
2685             {
2686                 while (ZOOM_event (1, &c))
2687                     ;
2688             }
2689         }
2690     }
2691 }
2692
2693 ZOOM_API(ZOOM_package)
2694     ZOOM_connection_package (ZOOM_connection c, ZOOM_options options)
2695 {
2696     ZOOM_package p = (ZOOM_package) xmalloc (sizeof(*p));
2697
2698     p->connection = c;
2699     p->odr_out = odr_createmem (ODR_ENCODE);
2700     p->options = ZOOM_options_create_with_parent2 (options, c->options);
2701     p->refcount = 1;
2702     p->buf_out = 0;
2703     p->len_out = 0;
2704     return p;
2705 }
2706
2707 ZOOM_API(void)
2708     ZOOM_package_destroy(ZOOM_package p)
2709 {
2710     if (!p)
2711         return;
2712     (p->refcount)--;
2713     if (p->refcount == 0)
2714     {
2715         odr_destroy (p->odr_out);
2716         xfree (p->buf_out);
2717
2718         ZOOM_options_destroy (p->options);
2719         xfree (p);
2720     }
2721 }
2722
2723 ZOOM_API(const char *)
2724 ZOOM_package_option_get (ZOOM_package p, const char *key)
2725 {
2726     return ZOOM_options_get (p->options, key);
2727 }
2728
2729
2730 ZOOM_API(void)
2731 ZOOM_package_option_set (ZOOM_package p, const char *key,
2732                               const char *val)
2733 {
2734     ZOOM_options_set (p->options, key, val);
2735 }
2736
2737 static int ZOOM_connection_exec_task (ZOOM_connection c)
2738 {
2739     ZOOM_task task = c->tasks;
2740     zoom_ret ret = zoom_complete;
2741
2742     if (!task)
2743     {
2744         yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task task=<null>");
2745         return 0;
2746     }
2747     yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task type=%d run=%d",
2748              task->which, task->running);
2749     if (c->error != ZOOM_ERROR_NONE)
2750     {
2751         yaz_log (LOG_DEBUG, "remove tasks because of error = %d", c->error);
2752         ZOOM_connection_remove_tasks (c);
2753         return 0;
2754     }
2755     if (task->running)
2756     {
2757         yaz_log (LOG_DEBUG, "task already running");
2758         return 0;
2759     }
2760     task->running = 1;
2761     ret = zoom_complete;
2762     if (c->cs || task->which == ZOOM_TASK_CONNECT)
2763     {
2764         switch (task->which)
2765         {
2766         case ZOOM_TASK_SEARCH:
2767             if (c->proto == PROTO_HTTP)
2768                 ret = ZOOM_connection_srw_send_search(c);
2769             else
2770                 ret = ZOOM_connection_send_search(c);
2771             break;
2772         case ZOOM_TASK_RETRIEVE:
2773             if (c->proto == PROTO_HTTP)
2774                 ret = ZOOM_connection_srw_send_search(c);
2775             else
2776                 ret = send_present (c);
2777             break;
2778         case ZOOM_TASK_CONNECT:
2779             ret = do_connect(c);
2780             break;
2781         case ZOOM_TASK_SCAN:
2782             ret = send_scan(c);
2783             break;
2784         case ZOOM_TASK_PACKAGE:
2785             ret = send_package(c);
2786             break;
2787         case ZOOM_TASK_SORT:
2788             c->tasks->u.sort.resultset->r_sort_spec =
2789                 c->tasks->u.sort.q->sort_spec;
2790             ret = send_sort(c, c->tasks->u.sort.resultset);
2791             break;
2792         }
2793     }
2794     else
2795     {
2796         yaz_log (LOG_DEBUG, "remove tasks because no connection exist");
2797         ZOOM_connection_remove_tasks (c);
2798     }
2799     if (ret == zoom_complete)
2800     {
2801         yaz_log (LOG_DEBUG, "task removed (complete)");
2802         ZOOM_connection_remove_task (c);
2803         return 0;
2804     }
2805     yaz_log (LOG_DEBUG, "task pending");
2806     return 1;
2807 }
2808
2809 static zoom_ret send_sort_present (ZOOM_connection c)
2810 {
2811     zoom_ret r = zoom_complete;
2812
2813     if (c->tasks && c->tasks->which == ZOOM_TASK_SEARCH)
2814         r = send_sort (c, c->tasks->u.search.resultset);
2815     if (r == zoom_complete)
2816         r = send_present (c);
2817     return r;
2818 }
2819
2820 static int es_response (ZOOM_connection c,
2821                         Z_ExtendedServicesResponse *res)
2822 {
2823     if (!c->tasks || c->tasks->which != ZOOM_TASK_PACKAGE)
2824         return 0;
2825     if (res->diagnostics && res->num_diagnostics > 0)
2826         response_diag(c, res->diagnostics[0]);
2827     if (res->taskPackage &&
2828         res->taskPackage->which == Z_External_extendedService)
2829     {
2830         Z_TaskPackage *taskPackage = res->taskPackage->u.extendedService;
2831         Odr_oct *id = taskPackage->targetReference;
2832
2833         if (id)
2834             ZOOM_options_setl (c->tasks->u.package->options,
2835                                "targetReference", (char*) id->buf, id->len);
2836     }
2837     return 1;
2838 }
2839
2840
2841 static void handle_apdu (ZOOM_connection c, Z_APDU *apdu)
2842 {
2843     Z_InitResponse *initrs;
2844
2845     c->mask = 0;
2846     yaz_log (LOG_DEBUG, "recv APDU type=%d", apdu->which);
2847     switch(apdu->which)
2848     {
2849     case Z_APDU_initResponse:
2850         initrs = apdu->u.initResponse;
2851         ZOOM_connection_option_set(c, "serverImplementationId",
2852                                    initrs->implementationId ?
2853                                    initrs->implementationId : "");
2854         ZOOM_connection_option_set(c, "serverImplementationName",
2855                                    initrs->implementationName ?
2856                                    initrs->implementationName : "");
2857         ZOOM_connection_option_set(c, "serverImplementationVersion",
2858                                    initrs->implementationVersion ?
2859                                    initrs->implementationVersion : "");
2860         /* Set the three old options too, for old applications */
2861         ZOOM_connection_option_set(c, "targetImplementationId",
2862                                    initrs->implementationId ?
2863                                    initrs->implementationId : "");
2864         ZOOM_connection_option_set(c, "targetImplementationName",
2865                                    initrs->implementationName ?
2866                                    initrs->implementationName : "");
2867         ZOOM_connection_option_set(c, "targetImplementationVersion",
2868                                    initrs->implementationVersion ?
2869                                    initrs->implementationVersion : "");
2870         if (!*initrs->result)
2871         {
2872             set_ZOOM_error(c, ZOOM_ERROR_INIT, 0);
2873         }
2874         else
2875         {
2876             char *cookie =
2877                 yaz_oi_get_string_oidval (&apdu->u.initResponse->otherInfo,
2878                                           VAL_COOKIE, 1, 0);
2879             xfree (c->cookie_in);
2880             c->cookie_in = 0;
2881             if (cookie)
2882                 c->cookie_in = xstrdup(cookie);
2883             if (ODR_MASK_GET(initrs->options, Z_Options_namedResultSets) &&
2884                 ODR_MASK_GET(initrs->protocolVersion, Z_ProtocolVersion_3))
2885                 c->support_named_resultsets = 1;
2886             if (c->tasks)
2887             {
2888                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2889                 ZOOM_connection_remove_task (c);
2890             }
2891             ZOOM_connection_exec_task (c);
2892         }
2893         if (ODR_MASK_GET(initrs->options, Z_Options_negotiationModel))
2894         {
2895             NMEM tmpmem = nmem_create();
2896             Z_CharSetandLanguageNegotiation *p =
2897                 yaz_get_charneg_record(initrs->otherInfo);
2898
2899             if (p)
2900             {
2901                 char *charset=NULL, *lang=NULL;
2902                 int sel;
2903
2904                 yaz_get_response_charneg(tmpmem, p, &charset, &lang, &sel);
2905                 yaz_log(LOG_DEBUG, "Target accepted: charset %s, "
2906                         "language %s, select %d",
2907                         charset ? charset : "none", lang ? lang : "none", sel);
2908                 if (charset)
2909                     ZOOM_connection_option_set (c, "negotiation-charset",
2910                                                 charset);
2911                 if (lang)
2912                     ZOOM_connection_option_set (c, "negotiation-lang",
2913                                                 lang);
2914                 nmem_destroy(tmpmem);
2915             }
2916         }
2917         break;
2918     case Z_APDU_searchResponse:
2919         handle_search_response (c, apdu->u.searchResponse);
2920         if (send_sort_present (c) == zoom_complete)
2921             ZOOM_connection_remove_task (c);
2922         break;
2923     case Z_APDU_presentResponse:
2924         handle_present_response (c, apdu->u.presentResponse);
2925         if (send_present (c) == zoom_complete)
2926             ZOOM_connection_remove_task (c);
2927         break;
2928     case Z_APDU_sortResponse:
2929         sort_response (c, apdu->u.sortResponse);
2930         if (send_present (c) == zoom_complete)
2931             ZOOM_connection_remove_task (c);
2932         break;
2933     case Z_APDU_scanResponse:
2934         scan_response (c, apdu->u.scanResponse);
2935         ZOOM_connection_remove_task (c);
2936         break;
2937     case Z_APDU_extendedServicesResponse:
2938         es_response (c, apdu->u.extendedServicesResponse);
2939         ZOOM_connection_remove_task (c);
2940         break;
2941     case Z_APDU_close:
2942         if (c->reconnect_ok)
2943         {
2944             do_close(c);
2945             c->tasks->running = 0;
2946             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2947         }
2948         else
2949         {
2950             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2951             do_close(c);
2952         }
2953         break;
2954     default:
2955         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2956         do_close(c);
2957     }
2958 }
2959
2960 #if HAVE_XML2
2961 static void handle_srw_response(ZOOM_connection c,
2962                                 Z_SRW_searchRetrieveResponse *res)
2963 {
2964     ZOOM_resultset resultset = 0;
2965     int i;
2966     NMEM nmem;
2967     ZOOM_Event event;
2968
2969     if (!c->tasks)
2970         return;
2971
2972     if (c->tasks->which == ZOOM_TASK_SEARCH)
2973         resultset = c->tasks->u.search.resultset;
2974     else if (c->tasks->which == ZOOM_TASK_RETRIEVE)
2975         resultset = c->tasks->u.retrieve.resultset;
2976     else
2977         return ;
2978
2979     event = ZOOM_Event_create(ZOOM_EVENT_RECV_SEARCH);
2980     ZOOM_connection_put_event(c, event);
2981
2982     resultset->size = 0;
2983
2984     yaz_log(LOG_DEBUG, "got SRW response OK");
2985
2986     if (res->numberOfRecords)
2987         resultset->size = *res->numberOfRecords;
2988
2989     for (i = 0; i<res->num_records; i++)
2990     {
2991         int pos;
2992
2993         Z_NamePlusRecord *npr = (Z_NamePlusRecord *)
2994             odr_malloc(c->odr_in, sizeof(Z_NamePlusRecord));
2995
2996         if (res->records[i].recordPosition &&
2997             *res->records[i].recordPosition > 0)
2998             pos = *res->records[i].recordPosition - 1;
2999         else
3000             pos = resultset->start + i;
3001
3002         npr->databaseName = 0;
3003         npr->which = Z_NamePlusRecord_databaseRecord;
3004         npr->u.databaseRecord = (Z_External *)
3005             odr_malloc(c->odr_in, sizeof(Z_External));
3006         npr->u.databaseRecord->descriptor = 0;
3007         npr->u.databaseRecord->direct_reference =
3008             yaz_oidval_to_z3950oid(c->odr_in, CLASS_RECSYN, VAL_TEXT_XML);
3009         npr->u.databaseRecord->which = Z_External_octet;
3010         npr->u.databaseRecord->u.octet_aligned = (Odr_oct *)
3011             odr_malloc(c->odr_in, sizeof(Odr_oct));
3012         npr->u.databaseRecord->u.octet_aligned->buf =
3013             res->records[i].recordData_buf;
3014         npr->u.databaseRecord->u.octet_aligned->len =
3015             npr->u.databaseRecord->u.octet_aligned->size =
3016             res->records[i].recordData_len;
3017         record_cache_add (resultset, npr, pos);
3018     }
3019     if (res->num_diagnostics > 0)
3020     {
3021         const char *uri = res->diagnostics[0].uri;
3022         if (uri)
3023         {
3024             int code = 0;
3025             const char *cp;
3026             if ((cp = strrchr(uri, '/')))
3027                 code = atoi(cp+1);
3028             set_dset_error(c, code, uri,
3029                            res->diagnostics[0].details, 0);
3030         }
3031     }
3032     nmem = odr_extract_mem(c->odr_in);
3033     nmem_transfer(resultset->odr->mem, nmem);
3034     nmem_destroy(nmem);
3035 }
3036 #endif
3037
3038 #if HAVE_XML2
3039 static void handle_http(ZOOM_connection c, Z_HTTP_Response *hres)
3040 {
3041     int ret = -1;
3042     const char *content_type = z_HTTP_header_lookup(hres->headers,
3043                                                     "Content-Type");
3044     const char *connection_head = z_HTTP_header_lookup(hres->headers,
3045                                                        "Connection");
3046     c->mask = 0;
3047     yaz_log (LOG_DEBUG, "handle_http");
3048
3049     if (content_type && !yaz_strcmp_del("text/xml", content_type, "; "))
3050     {
3051         Z_SOAP *soap_package = 0;
3052         ODR o = c->odr_in;
3053         Z_SOAP_Handler soap_handlers[2] = {
3054             {"http://www.loc.gov/zing/srw/", 0,
3055              (Z_SOAP_fun) yaz_srw_codec},
3056             {0, 0, 0}
3057         };
3058         ret = z_soap_codec(o, &soap_package,
3059                            &hres->content_buf, &hres->content_len,
3060                            soap_handlers);
3061         if (!ret && soap_package->which == Z_SOAP_generic &&
3062             soap_package->u.generic->no == 0)
3063         {
3064             Z_SRW_PDU *sr = soap_package->u.generic->p;
3065             if (sr->which == Z_SRW_searchRetrieve_response)
3066                 handle_srw_response(c, sr->u.response);
3067             else
3068                 ret = -1;
3069         }
3070         else if (!ret && (soap_package->which == Z_SOAP_fault
3071                           || soap_package->which == Z_SOAP_error))
3072         {
3073             set_HTTP_error(c, hres->code,
3074                            soap_package->u.fault->fault_code,
3075                            soap_package->u.fault->fault_string);
3076         }
3077         else
3078             ret = -1;
3079     }
3080     if (ret)
3081     {
3082         if (hres->code != 200)
3083             set_HTTP_error(c, hres->code, 0, 0);
3084         else
3085             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
3086         do_close (c);
3087     }
3088     ZOOM_connection_remove_task(c);
3089     if (!strcmp(hres->version, "1.0"))
3090     {
3091         /* HTTP 1.0: only if Keep-Alive we stay alive.. */
3092         if (!connection_head || strcmp(connection_head, "Keep-Alive"))
3093             do_close(c);
3094     }
3095     else
3096     {
3097         /* HTTP 1.1: only if no close we stay alive .. */
3098         if (connection_head && !strcmp(connection_head, "close"))
3099             do_close(c);
3100     }
3101 }
3102 #endif
3103
3104 static int do_read (ZOOM_connection c)
3105 {
3106     int r, more;
3107     ZOOM_Event event;
3108
3109     event = ZOOM_Event_create (ZOOM_EVENT_RECV_DATA);
3110     ZOOM_connection_put_event (c, event);
3111
3112     r = cs_get (c->cs, &c->buf_in, &c->len_in);
3113     more = cs_more(c->cs);
3114     yaz_log (LOG_DEBUG, "do_read len=%d more=%d", r, more);
3115     if (r == 1)
3116         return 0;
3117     if (r <= 0)
3118     {
3119         if (c->reconnect_ok)
3120         {
3121             do_close (c);
3122             c->reconnect_ok = 0;
3123             yaz_log (LOG_DEBUG, "reconnect read");
3124             c->tasks->running = 0;
3125             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
3126         }
3127         else
3128         {
3129             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
3130             do_close (c);
3131         }
3132     }
3133     else
3134     {
3135         Z_GDU *gdu;
3136         ZOOM_Event event;
3137
3138         odr_reset (c->odr_in);
3139         odr_setbuf (c->odr_in, c->buf_in, r, 0);
3140         event = ZOOM_Event_create (ZOOM_EVENT_RECV_APDU);
3141         ZOOM_connection_put_event (c, event);
3142
3143         if (!z_GDU (c->odr_in, &gdu, 0, 0))
3144         {
3145             int x;
3146             int err = odr_geterrorx(c->odr_in, &x);
3147             char msg[60];
3148             const char *element = odr_getelement(c->odr_in);
3149             sprintf (msg, "ODR code %d:%d element=%-20s",
3150                      err, x, element ? element : "<unknown>");
3151             set_ZOOM_error(c, ZOOM_ERROR_DECODE, msg);
3152             do_close (c);
3153         }
3154         else if (gdu->which == Z_GDU_Z3950)
3155             handle_apdu (c, gdu->u.z3950);
3156         else if (gdu->which == Z_GDU_HTTP_Response)
3157         {
3158 #if HAVE_XML2
3159             handle_http (c, gdu->u.HTTP_Response);
3160 #else
3161             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
3162             do_close (c);
3163 #endif
3164         }
3165         c->reconnect_ok = 0;
3166     }
3167     return 1;
3168 }
3169
3170 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out)
3171 {
3172     int r;
3173     ZOOM_Event event;
3174
3175     event = ZOOM_Event_create(ZOOM_EVENT_SEND_DATA);
3176     ZOOM_connection_put_event (c, event);
3177
3178     yaz_log (LOG_DEBUG, "do_write_ex len=%d", len_out);
3179     if ((r=cs_put (c->cs, buf_out, len_out)) < 0)
3180     {
3181         if (c->reconnect_ok)
3182         {
3183             do_close (c);
3184             c->reconnect_ok = 0;
3185             yaz_log (LOG_DEBUG, "reconnect write");
3186             c->tasks->running = 0;
3187             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
3188             return zoom_pending;
3189         }
3190         if (c->state == STATE_CONNECTING)
3191             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
3192         else
3193             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
3194         do_close (c);
3195         return zoom_complete;
3196     }
3197     else if (r == 1)
3198     {
3199         c->mask = ZOOM_SELECT_EXCEPT;
3200         if (c->cs->io_pending & CS_WANT_WRITE)
3201             c->mask += ZOOM_SELECT_WRITE;
3202         if (c->cs->io_pending & CS_WANT_READ)
3203             c->mask += ZOOM_SELECT_READ;
3204         yaz_log (LOG_DEBUG, "do_write_ex 1 mask=%d", c->mask);
3205     }
3206     else
3207     {
3208         c->mask = ZOOM_SELECT_READ|ZOOM_SELECT_EXCEPT;
3209         yaz_log (LOG_DEBUG, "do_write_ex 2 mask=%d", c->mask);
3210     }
3211     return zoom_pending;
3212 }
3213
3214 static zoom_ret do_write(ZOOM_connection c)
3215 {
3216     return do_write_ex (c, c->buf_out, c->len_out);
3217 }
3218
3219
3220 ZOOM_API(const char *)
3221 ZOOM_connection_option_get (ZOOM_connection c, const char *key)
3222 {
3223     return ZOOM_options_get (c->options, key);
3224 }
3225
3226 ZOOM_API(void)
3227 ZOOM_connection_option_set (ZOOM_connection c, const char *key,
3228                                   const char *val)
3229 {
3230     ZOOM_options_set (c->options, key, val);
3231 }
3232
3233 ZOOM_API(const char *)
3234 ZOOM_resultset_option_get (ZOOM_resultset r, const char *key)
3235 {
3236     return ZOOM_options_get (r->options, key);
3237 }
3238
3239 ZOOM_API(void)
3240 ZOOM_resultset_option_set (ZOOM_resultset r, const char *key,
3241                                   const char *val)
3242 {
3243     ZOOM_options_set (r->options, key, val);
3244 }
3245
3246
3247 ZOOM_API(int)
3248 ZOOM_connection_errcode (ZOOM_connection c)
3249 {
3250     return ZOOM_connection_error (c, 0, 0);
3251 }
3252
3253 ZOOM_API(const char *)
3254 ZOOM_connection_errmsg (ZOOM_connection c)
3255 {
3256     const char *msg;
3257     ZOOM_connection_error (c, &msg, 0);
3258     return msg;
3259 }
3260
3261 ZOOM_API(const char *)
3262 ZOOM_connection_addinfo (ZOOM_connection c)
3263 {
3264     const char *addinfo;
3265     ZOOM_connection_error (c, 0, &addinfo);
3266     return addinfo;
3267 }
3268
3269 ZOOM_API(const char *)
3270 ZOOM_diag_str (int error)
3271 {
3272     switch (error)
3273     {
3274     case ZOOM_ERROR_NONE:
3275         return "No error";
3276     case ZOOM_ERROR_CONNECT:
3277         return "Connect failed";
3278     case ZOOM_ERROR_MEMORY:
3279         return "Out of memory";
3280     case ZOOM_ERROR_ENCODE:
3281         return "Encoding failed";
3282     case ZOOM_ERROR_DECODE:
3283         return "Decoding failed";
3284     case ZOOM_ERROR_CONNECTION_LOST:
3285         return "Connection lost";
3286     case ZOOM_ERROR_INIT:
3287         return "Init rejected";
3288     case ZOOM_ERROR_INTERNAL:
3289         return "Internal failure";
3290     case ZOOM_ERROR_TIMEOUT:
3291         return "Timeout";
3292     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
3293         return "Unsupported protocol";
3294     case ZOOM_ERROR_UNSUPPORTED_QUERY:
3295         return "Unsupported query type";
3296     case ZOOM_ERROR_INVALID_QUERY:
3297         return "Invalid query";
3298     default:
3299         return diagbib1_str (error);
3300     }
3301 }
3302
3303 ZOOM_API(int)
3304 ZOOM_connection_error_x (ZOOM_connection c, const char **cp,
3305                          const char **addinfo, const char **diagset)
3306 {
3307     int error = c->error;
3308     if (cp)
3309     {
3310         if (!c->diagset || !strcmp(c->diagset, "ZOOM"))
3311             *cp = ZOOM_diag_str(error);
3312         else if (!strcmp(c->diagset, "HTTP"))
3313             *cp = z_HTTP_errmsg(c->error);
3314         else if (!strcmp(c->diagset, "Bib-1"))
3315             *cp = ZOOM_diag_str(error);
3316         else if (!strcmp(c->diagset, "info:srw/diagnostic/1"))
3317             *cp = yaz_diag_srw_str(c->error);
3318         else
3319             *cp = "Unknown error and diagnostic set";
3320     }
3321     if (addinfo)
3322         *addinfo = c->addinfo ? c->addinfo : "";
3323     if (diagset)
3324         *diagset = c->diagset ? c->diagset : "";
3325     return c->error;
3326 }
3327
3328 ZOOM_API(int)
3329 ZOOM_connection_error (ZOOM_connection c, const char **cp,
3330                        const char **addinfo)
3331 {
3332     return ZOOM_connection_error_x(c, cp, addinfo, 0);
3333 }
3334
3335 static int ZOOM_connection_do_io(ZOOM_connection c, int mask)
3336 {
3337     ZOOM_Event event = 0;
3338     int r = cs_look(c->cs);
3339     yaz_log (LOG_DEBUG, "ZOOM_connection_do_io c=%p mask=%d cs_look=%d",
3340              c, mask, r);
3341
3342     if (r == CS_NONE)
3343     {
3344         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
3345         set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
3346         do_close (c);
3347         ZOOM_connection_put_event (c, event);
3348     }
3349     else if (r == CS_CONNECT)
3350     {
3351         int ret;
3352         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
3353
3354         ret = cs_rcvconnect (c->cs);
3355         yaz_log (LOG_DEBUG, "cs_rcvconnect returned %d", ret);
3356         if (ret == 1)
3357         {
3358             c->mask = ZOOM_SELECT_EXCEPT;
3359             if (c->cs->io_pending & CS_WANT_WRITE)
3360                 c->mask += ZOOM_SELECT_WRITE;
3361             if (c->cs->io_pending & CS_WANT_READ)
3362                 c->mask += ZOOM_SELECT_READ;
3363             ZOOM_connection_put_event (c, event);
3364         }
3365         else if (ret == 0)
3366         {
3367             ZOOM_connection_put_event (c, event);
3368             if (c->proto == PROTO_Z3950)
3369                 ZOOM_connection_send_init(c);
3370             else
3371             {
3372                 /* no init request for SRW .. */
3373                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
3374                 ZOOM_connection_remove_task (c);
3375                 c->mask = 0;
3376                 ZOOM_connection_exec_task (c);
3377             }
3378             c->state = STATE_ESTABLISHED;
3379         }
3380         else
3381         {
3382             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
3383             do_close (c);
3384             ZOOM_connection_put_event (c, event);
3385         }
3386     }
3387     else
3388     {
3389         if (mask & ZOOM_SELECT_READ)
3390             do_read (c);
3391         if (c->cs && (mask & ZOOM_SELECT_WRITE))
3392             do_write (c);
3393     }
3394     return 1;
3395 }
3396
3397 ZOOM_API(int)
3398 ZOOM_connection_last_event(ZOOM_connection cs)
3399 {
3400     if (!cs)
3401         return ZOOM_EVENT_NONE;
3402     return cs->last_event;
3403 }
3404
3405 ZOOM_API(int)
3406 ZOOM_event (int no, ZOOM_connection *cs)
3407 {
3408     int timeout = 5000;
3409 #if HAVE_SYS_POLL_H
3410     struct pollfd pollfds[1024];
3411     ZOOM_connection poll_cs[1024];
3412 #else
3413     struct timeval tv;
3414     fd_set input, output, except;
3415 #endif
3416     int i, r, nfds;
3417     int max_fd = 0;
3418
3419     for (i = 0; i<no; i++)
3420     {
3421         ZOOM_connection c = cs[i];
3422         ZOOM_Event event;
3423         if (c && (event = ZOOM_connection_get_event(c)))
3424         {
3425             ZOOM_Event_destroy (event);
3426             return i+1;
3427         }
3428     }
3429     for (i = 0; i<no; i++)
3430     {
3431         ZOOM_connection c = cs[i];
3432         ZOOM_Event event;
3433         if (c && ZOOM_connection_exec_task (c))
3434         {
3435             if ((event = ZOOM_connection_get_event(c)))
3436             {
3437                 ZOOM_Event_destroy (event);
3438                 return i+1;
3439             }
3440         }
3441     }
3442 #if HAVE_SYS_POLL_H
3443
3444 #else
3445     FD_ZERO (&input);
3446     FD_ZERO (&output);
3447     FD_ZERO (&except);
3448 #endif
3449     nfds = 0;
3450     for (i = 0; i<no; i++)
3451     {
3452         ZOOM_connection c = cs[i];
3453         int fd, mask;
3454         int this_timeout;
3455
3456         if (!c)
3457             continue;
3458         fd = z3950_connection_socket(c);
3459         mask = z3950_connection_mask(c);
3460
3461         if (fd == -1)
3462             continue;
3463         if (max_fd < fd)
3464             max_fd = fd;
3465
3466         this_timeout = ZOOM_options_get_int (c->options, "timeout", -1);
3467         if (this_timeout != -1 && this_timeout < timeout)
3468             timeout = this_timeout;
3469 #if HAVE_SYS_POLL_H
3470         if (mask)
3471         {
3472             short poll_events = 0;
3473
3474             if (mask & ZOOM_SELECT_READ)
3475                 poll_events += POLLIN;
3476             if (mask & ZOOM_SELECT_WRITE)
3477                 poll_events += POLLOUT;
3478             if (mask & ZOOM_SELECT_EXCEPT)
3479                 poll_events += POLLERR;
3480             pollfds[nfds].fd = fd;
3481             pollfds[nfds].events = poll_events;
3482             pollfds[nfds].revents = 0;
3483             poll_cs[nfds] = c;
3484             nfds++;
3485         }
3486 #else
3487         if (mask & ZOOM_SELECT_READ)
3488         {
3489             FD_SET (fd, &input);
3490             nfds++;
3491         }
3492         if (mask & ZOOM_SELECT_WRITE)
3493         {
3494             FD_SET (fd, &output);
3495             nfds++;
3496         }
3497         if (mask & ZOOM_SELECT_EXCEPT)
3498         {
3499             FD_SET (fd, &except);
3500             nfds++;
3501         }
3502 #endif
3503     }
3504     if (timeout >= 5000)
3505         timeout = 30;
3506
3507     if (!nfds)
3508         return 0;
3509
3510 #if HAVE_SYS_POLL_H
3511     r = poll (pollfds, nfds, timeout * 1000);
3512     for (i = 0; i<nfds; i++)
3513     {
3514         ZOOM_connection c = poll_cs[i];
3515         if (r && c->mask)
3516         {
3517             int mask = 0;
3518             if (pollfds[i].revents & POLLIN)
3519                 mask += ZOOM_SELECT_READ;
3520             if (pollfds[i].revents & POLLOUT)
3521                 mask += ZOOM_SELECT_WRITE;
3522             if (pollfds[i].revents & POLLERR)
3523                 mask += ZOOM_SELECT_EXCEPT;
3524             if (mask)
3525                 ZOOM_connection_do_io(c, mask);
3526         }
3527         else if (r == 0 && c->mask)
3528         {
3529             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
3530             /* timeout and this connection was waiting */
3531             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
3532             do_close (c);
3533             ZOOM_connection_put_event(c, event);
3534         }
3535     }
3536 #else
3537     tv.tv_sec = timeout;
3538     tv.tv_usec = 0;
3539     yaz_log (LOG_DEBUG, "select start");
3540     r = select (max_fd+1, &input, &output, &except, &tv);
3541     yaz_log (LOG_DEBUG, "select stop, returned r=%d", r);
3542     for (i = 0; i<no; i++)
3543     {
3544         ZOOM_connection c = cs[i];
3545         int fd, mask;
3546
3547         if (!c)
3548             continue;
3549         fd = z3950_connection_socket(c);
3550         mask = 0;
3551         if (r && c->mask)
3552         {
3553             /* no timeout and real socket */
3554             if (FD_ISSET(fd, &input))
3555                 mask += ZOOM_SELECT_READ;
3556             if (FD_ISSET(fd, &output))
3557                 mask += ZOOM_SELECT_WRITE;
3558             if (FD_ISSET(fd, &except))
3559                 mask += ZOOM_SELECT_EXCEPT;
3560             if (mask)
3561                 ZOOM_connection_do_io(c, mask);
3562         }
3563         if (r == 0 && c->mask)
3564         {
3565             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
3566             /* timeout and this connection was waiting */
3567             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
3568             do_close (c);
3569             yaz_log (LOG_DEBUG, "timeout");
3570             ZOOM_connection_put_event(c, event);
3571         }
3572     }
3573 #endif
3574     for (i = 0; i<no; i++)
3575     {
3576         ZOOM_connection c = cs[i];
3577         ZOOM_Event event;
3578         if (c && (event = ZOOM_connection_get_event(c)))
3579         {
3580             ZOOM_Event_destroy (event);
3581             return i+1;
3582         }
3583     }
3584     return 0;
3585 }