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 1.26 2004-04-06 17:47:24 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: 1.26 $");
 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             int j = 0;
1593             i = i + 8; /* skip charset= */
1594             for (j = 0; type_spec[i]  && j < sizeof(charset)-1; i++, j++)
1595             {
1596                 if (type_spec[i] == ';' || type_spec[i] == ' ')
1597                     break;
1598                 charset[j] = cp[i];
1599             }
1600             charset[j] = '\0';
1601         }
1602         else if (!strncmp(type_spec+i, "xpath=", 6))
1603         {
1604             int j = 0;
1605             i = i + 6;
1606             for (j = 0; type_spec[i] && j < sizeof(xpath)-1; i++, j++)
1607                 xpath[j] = cp[i];
1608             xpath[j] = '\0';
1609         }
1610         while (type_spec[i] == ' ')
1611             i++;
1612     }
1613     if (!strcmp (type, "database"))
1614     {
1615         if (len)
1616             *len = (npr->databaseName ? strlen(npr->databaseName) : 0);
1617         return npr->databaseName;
1618     }
1619     else if (!strcmp (type, "syntax"))
1620     {
1621         const char *desc = 0;
1622         if (npr->which == Z_NamePlusRecord_databaseRecord)
1623         {
1624             Z_External *r = (Z_External *) npr->u.databaseRecord;
1625             oident *ent = oid_getentbyoid(r->direct_reference);
1626             if (ent)
1627                 desc = ent->desc;
1628         }
1629         if (!desc)
1630             desc = "none";
1631         if (len)
1632             *len = strlen(desc);
1633         return desc;
1634     }
1635     if (npr->which != Z_NamePlusRecord_databaseRecord)
1636         return 0;
1637
1638     /* from now on - we have a database record .. */
1639     if (!strcmp (type, "render"))
1640     {
1641         Z_External *r = (Z_External *) npr->u.databaseRecord;
1642         oident *ent = oid_getentbyoid(r->direct_reference);
1643
1644         /* render bibliographic record .. */
1645         if (r->which == Z_External_OPAC)
1646         {
1647             r = r->u.opac->bibliographicRecord;
1648             if (!r)
1649                 return 0;
1650             ent = oid_getentbyoid(r->direct_reference);
1651         }
1652         if (r->which == Z_External_sutrs)
1653             return record_iconv_return(rec, len,
1654                                        r->u.sutrs->buf, r->u.sutrs->len,
1655                                        charset);
1656         else if (r->which == Z_External_octet)
1657         {
1658             const char *ret_buf;
1659             switch (ent->value)
1660             {
1661             case VAL_SOIF:
1662             case VAL_HTML:
1663             case VAL_SUTRS:
1664                 break;
1665             case VAL_TEXT_XML:
1666             case VAL_APPLICATION_XML:
1667                 break;
1668             default:
1669                 ret_buf = marc_iconv_return(
1670                     rec, YAZ_MARC_LINE, len,
1671                     (const char *) r->u.octet_aligned->buf,
1672                     r->u.octet_aligned->len,
1673                     charset);
1674                 if (ret_buf)
1675                     return ret_buf;
1676             }
1677             return record_iconv_return(rec, len,
1678                                        (const char *) r->u.octet_aligned->buf,
1679                                        r->u.octet_aligned->len,
1680                                        charset);
1681         }
1682         else if (r->which == Z_External_grs1)
1683         {
1684             if (!rec->wrbuf_marc)
1685                 rec->wrbuf_marc = wrbuf_alloc();
1686             wrbuf_rewind (rec->wrbuf_marc);
1687             yaz_display_grs1(rec->wrbuf_marc, r->u.grs1, 0);
1688             return record_iconv_return(rec, len,
1689                                        wrbuf_buf(rec->wrbuf_marc),
1690                                        wrbuf_len(rec->wrbuf_marc),
1691                                        charset);
1692         }
1693         return 0;
1694     }
1695     else if (!strcmp (type, "xml") || !strcmp(type, "oai"))
1696     {
1697         Z_External *r = (Z_External *) npr->u.databaseRecord;
1698         oident *ent = oid_getentbyoid(r->direct_reference);
1699
1700         /* render bibliographic record .. */
1701         if (r->which == Z_External_OPAC)
1702         {
1703             r = r->u.opac->bibliographicRecord;
1704             if (!r)
1705                 return 0;
1706             ent = oid_getentbyoid(r->direct_reference);
1707         }
1708
1709         if (r->which == Z_External_sutrs)
1710             return record_iconv_return(rec, len,
1711                                        (const char *) r->u.sutrs->buf,
1712                                        r->u.sutrs->len,
1713                                        charset);
1714         else if (r->which == Z_External_octet)
1715         {
1716             const char *ret_buf;
1717             int marc_decode_type = YAZ_MARC_MARCXML;
1718
1719             if (!strcmp(type, "oai"))
1720                 marc_decode_type = YAZ_MARC_OAIMARC;
1721             switch (ent->value)
1722             {
1723             case VAL_SOIF:
1724             case VAL_HTML:
1725             case VAL_SUTRS:
1726                 break;
1727             case VAL_TEXT_XML:
1728             case VAL_APPLICATION_XML:
1729                 break;
1730             default:
1731                 ret_buf = marc_iconv_return(
1732                     rec, marc_decode_type, len,
1733                     (const char *) r->u.octet_aligned->buf,
1734                     r->u.octet_aligned->len,
1735                     charset);
1736                 if (ret_buf)
1737                     return ret_buf;
1738             }
1739             return record_iconv_return(rec, len,
1740                                        (const char *) r->u.octet_aligned->buf,
1741                                        r->u.octet_aligned->len,
1742                                        charset);
1743         }
1744         else if (r->which == Z_External_grs1)
1745         {
1746             if (len) *len = 5;
1747             return "GRS-1";
1748         }
1749         return 0;
1750     }
1751     else if (!strcmp (type, "raw"))
1752     {
1753         Z_External *r = (Z_External *) npr->u.databaseRecord;
1754
1755         if (r->which == Z_External_sutrs)
1756         {
1757             if (len) *len = r->u.sutrs->len;
1758             return (const char *) r->u.sutrs->buf;
1759         }
1760         else if (r->which == Z_External_octet)
1761         {
1762             if (len) *len = r->u.octet_aligned->len;
1763             return (const char *) r->u.octet_aligned->buf;
1764         }
1765         else /* grs-1, explain, OPAC, ... */
1766         {
1767             if (len) *len = -1;
1768             return (const char *) npr->u.databaseRecord;
1769         }
1770         return 0;
1771     }
1772     else if (!strcmp (type, "ext"))
1773     {
1774         if (len) *len = -1;
1775         return (const char *) npr->u.databaseRecord;
1776     }
1777     else if (!strcmp (type, "opac"))
1778
1779     {
1780         Z_External *r = (Z_External *) npr->u.databaseRecord;
1781         if (r->which == Z_External_OPAC)
1782         {
1783             if (!rec->wrbuf_opac)
1784                 rec->wrbuf_opac = wrbuf_alloc();
1785             wrbuf_rewind (rec->wrbuf_opac);
1786             yaz_display_OPAC(rec->wrbuf_opac, r->u.opac, 0);
1787             return record_iconv_return(rec, len,
1788                                        wrbuf_buf(rec->wrbuf_opac),
1789                                        wrbuf_len(rec->wrbuf_opac),
1790                                        charset);
1791         }
1792     }
1793     return 0;
1794 }
1795
1796 static int strcmp_null(const char *v1, const char *v2)
1797 {
1798     if (!v1 && !v2)
1799         return 0;
1800     if (!v1 || !v2)
1801         return -1;
1802     return strcmp(v1, v2);
1803 }
1804
1805 static void record_cache_add (ZOOM_resultset r, Z_NamePlusRecord *npr,
1806                               int pos)
1807 {
1808     ZOOM_record_cache rc;
1809     const char *elementSetName =
1810         ZOOM_resultset_option_get (r, "elementSetName");
1811     const char *syntax =
1812         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1813
1814     ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_RECV_RECORD);
1815     ZOOM_connection_put_event(r->connection, event);
1816
1817     for (rc = r->record_cache; rc; rc = rc->next)
1818     {
1819         if (pos == rc->pos)
1820         {
1821             if (strcmp_null(r->schema, rc->schema))
1822                 continue;
1823             if (strcmp_null(elementSetName,rc->elementSetName))
1824                 continue;
1825             if (strcmp_null(syntax, rc->syntax))
1826                 continue;
1827             /* not destroying rc->npr (it's handled by nmem )*/
1828             rc->rec.npr = npr;
1829             /* keeping wrbuf_marc too */
1830             return;
1831         }
1832     }
1833     rc = (ZOOM_record_cache) odr_malloc (r->odr, sizeof(*rc));
1834     rc->rec.npr = npr;
1835     rc->rec.odr = 0;
1836     rc->rec.wrbuf_marc = 0;
1837     rc->rec.wrbuf_iconv = 0;
1838     rc->rec.wrbuf_opac = 0;
1839     if (elementSetName)
1840         rc->elementSetName = odr_strdup (r->odr, elementSetName);
1841     else
1842         rc->elementSetName = 0;
1843
1844     if (syntax)
1845         rc->syntax = odr_strdup (r->odr, syntax);
1846     else
1847         rc->syntax = 0;
1848
1849     if (r->schema)
1850         rc->schema = odr_strdup (r->odr, r->schema);
1851     else
1852         rc->schema = 0;
1853
1854     rc->pos = pos;
1855     rc->next = r->record_cache;
1856     r->record_cache = rc;
1857 }
1858
1859 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos)
1860 {
1861     ZOOM_record_cache rc;
1862     const char *elementSetName =
1863         ZOOM_resultset_option_get (r, "elementSetName");
1864     const char *syntax =
1865         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1866
1867     for (rc = r->record_cache; rc; rc = rc->next)
1868     {
1869         if (pos == rc->pos)
1870         {
1871             if (strcmp_null(r->schema, rc->schema))
1872                 continue;
1873             if (strcmp_null(elementSetName,rc->elementSetName))
1874                 continue;
1875             if (strcmp_null(syntax, rc->syntax))
1876                 continue;
1877             return &rc->rec;
1878         }
1879     }
1880     return 0;
1881 }
1882
1883 static void handle_records (ZOOM_connection c, Z_Records *sr,
1884                             int present_phase)
1885 {
1886     ZOOM_resultset resultset;
1887
1888     if (!c->tasks)
1889         return ;
1890     switch (c->tasks->which)
1891     {
1892     case ZOOM_TASK_SEARCH:
1893         resultset = c->tasks->u.search.resultset;
1894         break;
1895     case ZOOM_TASK_RETRIEVE:
1896         resultset = c->tasks->u.retrieve.resultset;
1897         break;
1898     default:
1899         return;
1900     }
1901     if (sr && sr->which == Z_Records_NSD)
1902     {
1903         Z_DiagRec dr, *dr_p = &dr;
1904         dr.which = Z_DiagRec_defaultFormat;
1905         dr.u.defaultFormat = sr->u.nonSurrogateDiagnostic;
1906
1907         response_diag (c, dr_p);
1908     }
1909     else if (sr && sr->which == Z_Records_multipleNSD)
1910     {
1911         if (sr->u.multipleNonSurDiagnostics->num_diagRecs >= 1)
1912             response_diag(c, sr->u.multipleNonSurDiagnostics->diagRecs[0]);
1913         else
1914             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1915     }
1916     else
1917     {
1918         if (resultset->count + resultset->start > resultset->size)
1919             resultset->count = resultset->size - resultset->start;
1920         if (resultset->count < 0)
1921             resultset->count = 0;
1922         if (sr && sr->which == Z_Records_DBOSD)
1923         {
1924             int i;
1925             NMEM nmem = odr_extract_mem (c->odr_in);
1926             Z_NamePlusRecordList *p =
1927                 sr->u.databaseOrSurDiagnostics;
1928             for (i = 0; i<p->num_records; i++)
1929             {
1930                 record_cache_add (resultset, p->records[i],
1931                                   i+ resultset->start);
1932             }
1933             /* transfer our response to search_nmem .. we need it later */
1934             nmem_transfer (resultset->odr->mem, nmem);
1935             nmem_destroy (nmem);
1936             if (present_phase && p->num_records == 0)
1937             {
1938                 /* present response and we didn't get any records! */
1939                 set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1940             }
1941         }
1942         else if (present_phase)
1943         {
1944             /* present response and we didn't get any records! */
1945             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1946         }
1947     }
1948 }
1949
1950 static void handle_present_response (ZOOM_connection c, Z_PresentResponse *pr)
1951 {
1952     handle_records (c, pr->records, 1);
1953 }
1954
1955 static void handle_search_response (ZOOM_connection c, Z_SearchResponse *sr)
1956 {
1957     ZOOM_resultset resultset;
1958     ZOOM_Event event;
1959
1960     yaz_log (LOG_DEBUG, "got search response");
1961
1962     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1963         return ;
1964
1965     event = ZOOM_Event_create(ZOOM_EVENT_RECV_SEARCH);
1966     ZOOM_connection_put_event(c, event);
1967
1968     resultset = c->tasks->u.search.resultset;
1969
1970     resultset->size = *sr->resultCount;
1971     handle_records (c, sr->records, 0);
1972 }
1973
1974 static void sort_response (ZOOM_connection c, Z_SortResponse *res)
1975 {
1976     if (res->diagnostics && res->num_diagnostics > 0)
1977         response_diag (c, res->diagnostics[0]);
1978 }
1979
1980 static int scan_response (ZOOM_connection c, Z_ScanResponse *res)
1981 {
1982     NMEM nmem = odr_extract_mem (c->odr_in);
1983     ZOOM_scanset scan;
1984
1985     if (!c->tasks || c->tasks->which != ZOOM_TASK_SCAN)
1986         return 0;
1987     scan = c->tasks->u.scan.scan;
1988
1989     if (res->entries && res->entries->nonsurrogateDiagnostics)
1990         response_diag(c, res->entries->nonsurrogateDiagnostics[0]);
1991     scan->scan_response = res;
1992     nmem_transfer (scan->odr->mem, nmem);
1993     if (res->stepSize)
1994         ZOOM_options_set_int (scan->options, "stepSize", *res->stepSize);
1995     if (res->positionOfTerm)
1996         ZOOM_options_set_int (scan->options, "position", *res->positionOfTerm);
1997     if (res->scanStatus)
1998         ZOOM_options_set_int (scan->options, "scanStatus", *res->scanStatus);
1999     if (res->numberOfEntriesReturned)
2000         ZOOM_options_set_int (scan->options, "number",
2001                               *res->numberOfEntriesReturned);
2002     nmem_destroy (nmem);
2003     return 1;
2004 }
2005
2006 static zoom_ret send_sort (ZOOM_connection c,
2007                            ZOOM_resultset resultset)
2008 {
2009     if (c->error)
2010         resultset->r_sort_spec = 0;
2011     if (resultset->r_sort_spec)
2012     {
2013         Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_sortRequest);
2014         Z_SortRequest *req = apdu->u.sortRequest;
2015
2016         req->num_inputResultSetNames = 1;
2017         req->inputResultSetNames = (Z_InternationalString **)
2018             odr_malloc (c->odr_out, sizeof(*req->inputResultSetNames));
2019         req->inputResultSetNames[0] =
2020             odr_strdup (c->odr_out, resultset->setname);
2021         req->sortedResultSetName = odr_strdup (c->odr_out, resultset->setname);
2022         req->sortSequence = resultset->r_sort_spec;
2023         resultset->r_sort_spec = 0;
2024         return send_APDU (c, apdu);
2025     }
2026     return zoom_complete;
2027 }
2028
2029 static zoom_ret send_present (ZOOM_connection c)
2030 {
2031     Z_APDU *apdu = 0;
2032     Z_PresentRequest *req = 0;
2033     int i = 0;
2034     const char *syntax = 0;
2035     const char *elementSetName = 0;
2036     ZOOM_resultset  resultset;
2037
2038     if (!c->tasks)
2039         return zoom_complete;
2040
2041     switch (c->tasks->which)
2042     {
2043     case ZOOM_TASK_SEARCH:
2044         resultset = c->tasks->u.search.resultset;
2045         break;
2046     case ZOOM_TASK_RETRIEVE:
2047         resultset = c->tasks->u.retrieve.resultset;
2048         resultset->start = c->tasks->u.retrieve.start;
2049         resultset->count = c->tasks->u.retrieve.count;
2050
2051         if (resultset->start >= resultset->size)
2052             return zoom_complete;
2053         if (resultset->start + resultset->count > resultset->size)
2054             resultset->count = resultset->size - resultset->start;
2055         break;
2056     default:
2057         return zoom_complete;
2058     }
2059
2060     syntax = ZOOM_resultset_option_get (resultset, "preferredRecordSyntax");
2061     elementSetName = ZOOM_resultset_option_get (resultset, "elementSetName");
2062
2063     if (c->error)                  /* don't continue on error */
2064         return zoom_complete;
2065     if (resultset->start < 0)
2066         return zoom_complete;
2067     for (i = 0; i<resultset->count; i++)
2068     {
2069         ZOOM_record rec =
2070             record_cache_lookup (resultset, i + resultset->start);
2071         if (!rec)
2072             break;
2073     }
2074     if (i == resultset->count)
2075         return zoom_complete;
2076
2077     apdu = zget_APDU(c->odr_out, Z_APDU_presentRequest);
2078     req = apdu->u.presentRequest;
2079
2080     resultset->start += i;
2081     resultset->count -= i;
2082     *req->resultSetStartPoint = resultset->start + 1;
2083     *req->numberOfRecordsRequested = resultset->step>0 ?
2084         resultset->step : resultset->count;
2085     assert (*req->numberOfRecordsRequested > 0);
2086
2087     if (syntax && *syntax)
2088         req->preferredRecordSyntax =
2089             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
2090
2091     if (resultset->schema && *resultset->schema)
2092     {
2093         Z_RecordComposition *compo = (Z_RecordComposition *)
2094             odr_malloc (c->odr_out, sizeof(*compo));
2095
2096         req->recordComposition = compo;
2097         compo->which = Z_RecordComp_complex;
2098         compo->u.complex = (Z_CompSpec *)
2099             odr_malloc(c->odr_out, sizeof(*compo->u.complex));
2100         compo->u.complex->selectAlternativeSyntax = (bool_t *)
2101             odr_malloc(c->odr_out, sizeof(bool_t));
2102         *compo->u.complex->selectAlternativeSyntax = 0;
2103
2104         compo->u.complex->generic = (Z_Specification *)
2105             odr_malloc(c->odr_out, sizeof(*compo->u.complex->generic));
2106
2107         compo->u.complex->generic->which = Z_Schema_oid;
2108         compo->u.complex->generic->schema.oid = (Odr_oid *)
2109             yaz_str_to_z3950oid (c->odr_out, CLASS_SCHEMA, resultset->schema);
2110
2111         if (!compo->u.complex->generic->schema.oid)
2112         {
2113             /* OID wasn't a schema! Try record syntax instead. */
2114
2115             compo->u.complex->generic->schema.oid = (Odr_oid *)
2116                 yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, resultset->schema);
2117         }
2118         if (elementSetName && *elementSetName)
2119         {
2120             compo->u.complex->generic->elementSpec = (Z_ElementSpec *)
2121                 odr_malloc(c->odr_out, sizeof(Z_ElementSpec));
2122             compo->u.complex->generic->elementSpec->which =
2123                 Z_ElementSpec_elementSetName;
2124             compo->u.complex->generic->elementSpec->u.elementSetName =
2125                 odr_strdup (c->odr_out, elementSetName);
2126         }
2127         else
2128             compo->u.complex->generic->elementSpec = 0;
2129         compo->u.complex->num_dbSpecific = 0;
2130         compo->u.complex->dbSpecific = 0;
2131         compo->u.complex->num_recordSyntax = 0;
2132         compo->u.complex->recordSyntax = 0;
2133     }
2134     else if (elementSetName && *elementSetName)
2135     {
2136         Z_ElementSetNames *esn = (Z_ElementSetNames *)
2137             odr_malloc (c->odr_out, sizeof(*esn));
2138         Z_RecordComposition *compo = (Z_RecordComposition *)
2139             odr_malloc (c->odr_out, sizeof(*compo));
2140
2141         esn->which = Z_ElementSetNames_generic;
2142         esn->u.generic = odr_strdup (c->odr_out, elementSetName);
2143         compo->which = Z_RecordComp_simple;
2144         compo->u.simple = esn;
2145         req->recordComposition = compo;
2146     }
2147     req->resultSetId = odr_strdup(c->odr_out, resultset->setname);
2148     return send_APDU (c, apdu);
2149 }
2150
2151 ZOOM_API(ZOOM_scanset)
2152 ZOOM_connection_scan (ZOOM_connection c, const char *start)
2153 {
2154     ZOOM_scanset scan = (ZOOM_scanset) xmalloc (sizeof(*scan));
2155
2156     scan->connection = c;
2157     scan->odr = odr_createmem (ODR_DECODE);
2158     scan->options = ZOOM_options_create_with_parent (c->options);
2159     scan->refcount = 1;
2160     scan->scan_response = 0;
2161
2162     if ((scan->termListAndStartPoint =
2163          p_query_scan(scan->odr, PROTO_Z3950, &scan->attributeSet,
2164                       start)))
2165     {
2166         ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_SCAN);
2167         task->u.scan.scan = scan;
2168
2169         (scan->refcount)++;
2170         if (!c->async)
2171         {
2172             while (ZOOM_event (1, &c))
2173                 ;
2174         }
2175     }
2176     return scan;
2177 }
2178
2179 ZOOM_API(void)
2180 ZOOM_scanset_destroy (ZOOM_scanset scan)
2181 {
2182     if (!scan)
2183         return;
2184     (scan->refcount)--;
2185     if (scan->refcount == 0)
2186     {
2187         odr_destroy (scan->odr);
2188
2189         ZOOM_options_destroy (scan->options);
2190         xfree (scan);
2191     }
2192 }
2193
2194 static zoom_ret send_package (ZOOM_connection c)
2195 {
2196     ZOOM_Event event;
2197     if (!c->tasks)
2198         return zoom_complete;
2199     assert (c->tasks->which == ZOOM_TASK_PACKAGE);
2200
2201     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
2202     ZOOM_connection_put_event (c, event);
2203
2204     return do_write_ex (c, c->tasks->u.package->buf_out,
2205                         c->tasks->u.package->len_out);
2206 }
2207
2208 static zoom_ret send_scan (ZOOM_connection c)
2209 {
2210     ZOOM_scanset scan;
2211     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_scanRequest);
2212     Z_ScanRequest *req = apdu->u.scanRequest;
2213     if (!c->tasks)
2214         return zoom_complete;
2215     assert (c->tasks->which == ZOOM_TASK_SCAN);
2216     scan = c->tasks->u.scan.scan;
2217
2218     req->termListAndStartPoint = scan->termListAndStartPoint;
2219     req->attributeSet = scan->attributeSet;
2220
2221     *req->numberOfTermsRequested =
2222         ZOOM_options_get_int(scan->options, "number", 10);
2223
2224     req->preferredPositionInResponse =
2225         odr_intdup (c->odr_out,
2226                     ZOOM_options_get_int(scan->options, "position", 1));
2227
2228     req->stepSize =
2229         odr_intdup (c->odr_out,
2230                     ZOOM_options_get_int(scan->options, "stepSize", 0));
2231
2232     req->databaseNames = set_DatabaseNames (c, scan->options,
2233                                             &req->num_databaseNames);
2234
2235     return send_APDU (c, apdu);
2236 }
2237
2238 ZOOM_API(size_t)
2239 ZOOM_scanset_size (ZOOM_scanset scan)
2240 {
2241     if (!scan || !scan->scan_response || !scan->scan_response->entries)
2242         return 0;
2243     return scan->scan_response->entries->num_entries;
2244 }
2245
2246 ZOOM_API(const char *)
2247 ZOOM_scanset_term (ZOOM_scanset scan, size_t pos,
2248                    int *occ, int *len)
2249 {
2250     const char *term = 0;
2251     size_t noent = ZOOM_scanset_size (scan);
2252     Z_ScanResponse *res = scan->scan_response;
2253
2254     *len = 0;
2255     *occ = 0;
2256     if (pos >= noent)
2257         return 0;
2258     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
2259     {
2260         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
2261
2262         if (t->term->which == Z_Term_general)
2263         {
2264             term = (const char *) t->term->u.general->buf;
2265             *len = t->term->u.general->len;
2266         }
2267         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
2268     }
2269     return term;
2270 }
2271
2272 ZOOM_API(const char *)
2273 ZOOM_scanset_display_term (ZOOM_scanset scan, size_t pos,
2274                            int *occ, int *len)
2275 {
2276     const char *term = 0;
2277     size_t noent = ZOOM_scanset_size (scan);
2278     Z_ScanResponse *res = scan->scan_response;
2279
2280     *len = 0;
2281     *occ = 0;
2282     if (pos >= noent)
2283         return 0;
2284     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
2285     {
2286         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
2287
2288         if (t->displayTerm)
2289         {
2290             term = t->displayTerm;
2291             *len = strlen(term);
2292         }
2293         else if (t->term->which == Z_Term_general)
2294         {
2295             term = (const char *) t->term->u.general->buf;
2296             *len = t->term->u.general->len;
2297         }
2298         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
2299     }
2300     return term;
2301 }
2302
2303 ZOOM_API(const char *)
2304 ZOOM_scanset_option_get (ZOOM_scanset scan, const char *key)
2305 {
2306     return ZOOM_options_get (scan->options, key);
2307 }
2308
2309 ZOOM_API(void)
2310 ZOOM_scanset_option_set (ZOOM_scanset scan, const char *key,
2311                               const char *val)
2312 {
2313     ZOOM_options_set (scan->options, key, val);
2314 }
2315
2316 static Z_APDU *create_es_package (ZOOM_package p, int type)
2317 {
2318     const char *str;
2319     Z_APDU *apdu = zget_APDU(p->odr_out, Z_APDU_extendedServicesRequest);
2320     Z_ExtendedServicesRequest *req = apdu->u.extendedServicesRequest;
2321
2322     *req->function = Z_ExtendedServicesRequest_create;
2323
2324     str = ZOOM_options_get(p->options, "package-name");
2325     if (str && *str)
2326         req->packageName = nmem_strdup (p->odr_out->mem, str);
2327
2328     str = ZOOM_options_get(p->options, "user-id");
2329     if (str)
2330         req->userId = nmem_strdup (p->odr_out->mem, str);
2331
2332     req->packageType = yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2333                                               type);
2334
2335     str = ZOOM_options_get(p->options, "function");
2336     if (str)
2337     {
2338         if (!strcmp (str, "create"))
2339             *req->function = 1;
2340         if (!strcmp (str, "delete"))
2341             *req->function = 2;
2342         if (!strcmp (str, "modify"))
2343             *req->function = 3;
2344     }
2345     return apdu;
2346 }
2347
2348 static const char *ill_array_lookup (void *clientData, const char *idx)
2349 {
2350     ZOOM_package p = (ZOOM_package) clientData;
2351     return ZOOM_options_get (p->options, idx+4);
2352 }
2353
2354 static Z_External *encode_ill_request (ZOOM_package p)
2355 {
2356     ODR out = p->odr_out;
2357     ILL_Request *req;
2358     Z_External *r = 0;
2359     struct ill_get_ctl ctl;
2360
2361     ctl.odr = p->odr_out;
2362     ctl.clientData = p;
2363     ctl.f = ill_array_lookup;
2364
2365     req = ill_get_ILLRequest(&ctl, "ill", 0);
2366
2367     if (!ill_Request (out, &req, 0, 0))
2368     {
2369         int ill_request_size;
2370         char *ill_request_buf = odr_getbuf (out, &ill_request_size, 0);
2371         if (ill_request_buf)
2372             odr_setbuf (out, ill_request_buf, ill_request_size, 1);
2373         return 0;
2374     }
2375     else
2376     {
2377         oident oid;
2378         int illRequest_size = 0;
2379         char *illRequest_buf = odr_getbuf (out, &illRequest_size, 0);
2380
2381         oid.proto = PROTO_GENERAL;
2382         oid.oclass = CLASS_GENERAL;
2383         oid.value = VAL_ISO_ILL_1;
2384
2385         r = (Z_External *) odr_malloc (out, sizeof(*r));
2386         r->direct_reference = odr_oiddup(out,oid_getoidbyent(&oid));
2387         r->indirect_reference = 0;
2388         r->descriptor = 0;
2389         r->which = Z_External_single;
2390
2391         r->u.single_ASN1_type = (Odr_oct *)
2392             odr_malloc (out, sizeof(*r->u.single_ASN1_type));
2393         r->u.single_ASN1_type->buf = (unsigned char*)
2394             odr_malloc (out, illRequest_size);
2395         r->u.single_ASN1_type->len = illRequest_size;
2396         r->u.single_ASN1_type->size = illRequest_size;
2397         memcpy (r->u.single_ASN1_type->buf, illRequest_buf, illRequest_size);
2398     }
2399     return r;
2400 }
2401
2402 static Z_ItemOrder *encode_item_order(ZOOM_package p)
2403 {
2404     Z_ItemOrder *req = (Z_ItemOrder *) odr_malloc (p->odr_out, sizeof(*req));
2405     const char *str;
2406
2407     req->which=Z_IOItemOrder_esRequest;
2408     req->u.esRequest = (Z_IORequest *)
2409         odr_malloc(p->odr_out,sizeof(Z_IORequest));
2410
2411     /* to keep part ... */
2412     req->u.esRequest->toKeep = (Z_IOOriginPartToKeep *)
2413         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartToKeep));
2414     req->u.esRequest->toKeep->supplDescription = 0;
2415     req->u.esRequest->toKeep->contact = (Z_IOContact *)
2416         odr_malloc (p->odr_out, sizeof(*req->u.esRequest->toKeep->contact));
2417
2418     str = ZOOM_options_get(p->options, "contact-name");
2419     req->u.esRequest->toKeep->contact->name = str ?
2420         nmem_strdup (p->odr_out->mem, str) : 0;
2421
2422     str = ZOOM_options_get(p->options, "contact-phone");
2423     req->u.esRequest->toKeep->contact->phone = str ?
2424         nmem_strdup (p->odr_out->mem, str) : 0;
2425
2426     str = ZOOM_options_get(p->options, "contact-email");
2427     req->u.esRequest->toKeep->contact->email = str ?
2428         nmem_strdup (p->odr_out->mem, str) : 0;
2429
2430     req->u.esRequest->toKeep->addlBilling = 0;
2431
2432     /* not to keep part ... */
2433     req->u.esRequest->notToKeep = (Z_IOOriginPartNotToKeep *)
2434         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartNotToKeep));
2435
2436     str = ZOOM_options_get(p->options, "itemorder-setname");
2437     if (!str)
2438         str = "default";
2439
2440     if (!*str)
2441         req->u.esRequest->notToKeep->resultSetItem = 0;
2442     else
2443     {
2444         req->u.esRequest->notToKeep->resultSetItem = (Z_IOResultSetItem *)
2445            odr_malloc(p->odr_out, sizeof(Z_IOResultSetItem));
2446
2447         req->u.esRequest->notToKeep->resultSetItem->resultSetId =
2448            nmem_strdup (p->odr_out->mem, str);
2449         req->u.esRequest->notToKeep->resultSetItem->item =
2450             (int *) odr_malloc(p->odr_out, sizeof(int));
2451
2452         str = ZOOM_options_get(p->options, "itemorder-item");
2453         *req->u.esRequest->notToKeep->resultSetItem->item =
2454             (str ? atoi(str) : 1);
2455     }
2456     req->u.esRequest->notToKeep->itemRequest = encode_ill_request(p);
2457
2458     return req;
2459 }
2460
2461 Z_APDU *create_admin_package(ZOOM_package p, int type,
2462                              Z_ESAdminOriginPartToKeep **toKeepP,
2463                              Z_ESAdminOriginPartNotToKeep **notToKeepP)
2464 {
2465     Z_APDU *apdu = create_es_package (p, VAL_ADMINSERVICE);
2466     if (apdu)
2467     {
2468         Z_ESAdminOriginPartToKeep  *toKeep;
2469         Z_ESAdminOriginPartNotToKeep  *notToKeep;
2470         Z_External *r = (Z_External *) odr_malloc (p->odr_out, sizeof(*r));
2471         const char *first_db = "Default";
2472         int num_db;
2473         char **db = set_DatabaseNames(p->connection, p->options, &num_db);
2474         if (num_db > 0)
2475             first_db = db[0];
2476
2477         r->direct_reference =
2478             yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2479                                    VAL_ADMINSERVICE);
2480         r->descriptor = 0;
2481         r->indirect_reference = 0;
2482         r->which = Z_External_ESAdmin;
2483
2484         r->u.adminService = (Z_Admin *)
2485             odr_malloc(p->odr_out, sizeof(*r->u.adminService));
2486         r->u.adminService->which = Z_Admin_esRequest;
2487         r->u.adminService->u.esRequest = (Z_AdminEsRequest *)
2488             odr_malloc(p->odr_out, sizeof(*r->u.adminService->u.esRequest));
2489
2490         toKeep = r->u.adminService->u.esRequest->toKeep =
2491             (Z_ESAdminOriginPartToKeep *)
2492             odr_malloc(p->odr_out, sizeof(*r->u.adminService->u.esRequest->toKeep));
2493         toKeep->which=type;
2494         toKeep->databaseName = odr_strdup(p->odr_out, first_db);
2495         toKeep->u.create=odr_nullval();
2496         apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2497
2498         r->u.adminService->u.esRequest->notToKeep = notToKeep =
2499             (Z_ESAdminOriginPartNotToKeep *)
2500             odr_malloc(p->odr_out,
2501                        sizeof(*r->u.adminService->u.esRequest->notToKeep));
2502         notToKeep->which=Z_ESAdminOriginPartNotToKeep_recordsWillFollow;
2503         notToKeep->u.recordsWillFollow=odr_nullval();
2504         if (toKeepP)
2505             *toKeepP = toKeep;
2506         if (notToKeepP)
2507             *notToKeepP = notToKeep;
2508     }
2509     return apdu;
2510 }
2511
2512 static Z_APDU *create_update_package(ZOOM_package p)
2513 {
2514     Z_APDU *apdu = 0;
2515     const char *first_db = "Default";
2516     int num_db;
2517     char **db = set_DatabaseNames(p->connection, p->options, &num_db);
2518     const char *action = ZOOM_options_get(p->options, "action");
2519     const char *recordIdOpaque = ZOOM_options_get(p->options, "recordIdOpaque");
2520     const char *recordIdNumber = ZOOM_options_get(p->options, "recordIdNumber");
2521     const char *record_buf = ZOOM_options_get(p->options, "record");
2522     const char *syntax_str = ZOOM_options_get(p->options, "syntax");
2523     int syntax_oid = VAL_NONE;
2524     int action_no = -1;
2525
2526     if (syntax_str)
2527         syntax_oid = oid_getvalbyname(syntax_str);
2528     if (!record_buf)
2529     {
2530         record_buf = "void";
2531         syntax_oid = VAL_SUTRS;
2532     }
2533     if (syntax_oid != VAL_NONE)
2534         syntax_oid = VAL_TEXT_XML;
2535
2536     if (num_db > 0)
2537         first_db = db[0];
2538
2539     if (!action)
2540         action = "specialUpdate";
2541
2542     if (!strcmp(action, "recordInsert"))
2543         action_no = Z_IUOriginPartToKeep_recordInsert;
2544     else if (!strcmp(action, "recordReplace"))
2545         action_no = Z_IUOriginPartToKeep_recordReplace;
2546     else if (!strcmp(action, "recordDelete"))
2547         action_no = Z_IUOriginPartToKeep_recordDelete;
2548     else if (!strcmp(action, "elementUpdate"))
2549         action_no = Z_IUOriginPartToKeep_elementUpdate;
2550     else if (!strcmp(action, "specialUpdate"))
2551         action_no = Z_IUOriginPartToKeep_specialUpdate;
2552     else
2553         return 0;
2554
2555     apdu = create_es_package (p, VAL_DBUPDATE);
2556     if (apdu)
2557     {
2558         Z_IUOriginPartToKeep *toKeep;
2559         Z_IUSuppliedRecords *notToKeep;
2560         Z_External *r = (Z_External *)
2561             odr_malloc (p->odr_out, sizeof(*r));
2562
2563         apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2564
2565         r->direct_reference =
2566             yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2567                                    VAL_DBUPDATE);
2568         r->descriptor = 0;
2569         r->which = Z_External_update;
2570         r->indirect_reference = 0;
2571         r->u.update = (Z_IUUpdate *)
2572             odr_malloc(p->odr_out, sizeof(*r->u.update));
2573
2574         r->u.update->which = Z_IUUpdate_esRequest;
2575         r->u.update->u.esRequest = (Z_IUUpdateEsRequest *)
2576             odr_malloc(p->odr_out, sizeof(*r->u.update->u.esRequest));
2577         toKeep = r->u.update->u.esRequest->toKeep =
2578             (Z_IUOriginPartToKeep *)
2579             odr_malloc(p->odr_out, sizeof(*toKeep));
2580
2581         toKeep->databaseName = odr_strdup(p->odr_out, first_db);
2582         toKeep->schema = 0;
2583         toKeep->elementSetName = 0;
2584         toKeep->actionQualifier = 0;
2585         toKeep->action = odr_intdup(p->odr_out, action_no);
2586
2587         notToKeep = r->u.update->u.esRequest->notToKeep =
2588             (Z_IUSuppliedRecords *)
2589             odr_malloc(p->odr_out, sizeof(*notToKeep));
2590         notToKeep->num = 1;
2591         notToKeep->elements = (Z_IUSuppliedRecords_elem **)
2592             odr_malloc(p->odr_out, sizeof(*notToKeep->elements));
2593         notToKeep->elements[0] = (Z_IUSuppliedRecords_elem *)
2594             odr_malloc(p->odr_out, sizeof(**notToKeep->elements));
2595         notToKeep->elements[0]->which = Z_IUSuppliedRecords_elem_opaque;
2596         if (recordIdOpaque)
2597         {
2598             notToKeep->elements[0]->u.opaque = (Odr_oct *)
2599                 odr_malloc (p->odr_out, sizeof(Odr_oct));
2600             notToKeep->elements[0]->u.opaque->size =
2601                 notToKeep->elements[0]->u.opaque->len = strlen(recordIdOpaque);
2602             notToKeep->elements[0]->u.opaque->buf =
2603                 odr_strdup(p->odr_out, recordIdOpaque);
2604         }
2605         else if (recordIdNumber)
2606         {
2607             notToKeep->elements[0]->which = Z_IUSuppliedRecords_elem_number;
2608
2609             notToKeep->elements[0]->u.number =
2610                 odr_intdup(p->odr_out, atoi(recordIdNumber));
2611         }
2612         else
2613             notToKeep->elements[0]->u.opaque = 0;
2614         notToKeep->elements[0]->supplementalId = 0;
2615         notToKeep->elements[0]->correlationInfo = 0;
2616         notToKeep->elements[0]->record =
2617             z_ext_record(p->odr_out, syntax_oid,
2618                          record_buf, strlen(record_buf));
2619     }
2620     if (0 && apdu)
2621     {
2622        ODR print = odr_createmem(ODR_PRINT);
2623
2624        z_APDU(print, &apdu, 0, 0);
2625        odr_destroy(print);
2626     }
2627     return apdu;
2628 }
2629
2630 ZOOM_API(void)
2631     ZOOM_package_send (ZOOM_package p, const char *type)
2632 {
2633     Z_APDU *apdu = 0;
2634     ZOOM_connection c;
2635     if (!p)
2636         return;
2637     c = p->connection;
2638     odr_reset (p->odr_out);
2639     xfree (p->buf_out);
2640     p->buf_out = 0;
2641     if (!strcmp(type, "itemorder"))
2642     {
2643         apdu = create_es_package (p, VAL_ITEMORDER);
2644         if (apdu)
2645         {
2646             Z_External *r = (Z_External *) odr_malloc (p->odr_out, sizeof(*r));
2647
2648             r->direct_reference =
2649                 yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2650                                        VAL_ITEMORDER);
2651             r->descriptor = 0;
2652             r->which = Z_External_itemOrder;
2653             r->indirect_reference = 0;
2654             r->u.itemOrder = encode_item_order (p);
2655
2656             apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2657         }
2658     }
2659     if (!strcmp(type, "create"))  /* create database */
2660     {
2661         apdu = create_admin_package(p, Z_ESAdminOriginPartToKeep_create,
2662                                     0, 0);
2663     }
2664     if (!strcmp(type, "drop"))  /* drop database */
2665     {
2666         apdu = create_admin_package(p, Z_ESAdminOriginPartToKeep_drop,
2667                                     0, 0);
2668     }
2669     if (!strcmp(type, "update")) /* update record(s) */
2670     {
2671         apdu = create_update_package(p);
2672     }
2673     if (apdu)
2674     {
2675         if (encode_APDU(p->connection, apdu, p->odr_out) == 0)
2676         {
2677             char *buf;
2678
2679             ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_PACKAGE);
2680             task->u.package = p;
2681             buf = odr_getbuf(p->odr_out, &p->len_out, 0);
2682             p->buf_out = (char *) xmalloc (p->len_out);
2683             memcpy (p->buf_out, buf, p->len_out);
2684
2685             (p->refcount)++;
2686             if (!c->async)
2687             {
2688                 while (ZOOM_event (1, &c))
2689                     ;
2690             }
2691         }
2692     }
2693 }
2694
2695 ZOOM_API(ZOOM_package)
2696     ZOOM_connection_package (ZOOM_connection c, ZOOM_options options)
2697 {
2698     ZOOM_package p = (ZOOM_package) xmalloc (sizeof(*p));
2699
2700     p->connection = c;
2701     p->odr_out = odr_createmem (ODR_ENCODE);
2702     p->options = ZOOM_options_create_with_parent2 (options, c->options);
2703     p->refcount = 1;
2704     p->buf_out = 0;
2705     p->len_out = 0;
2706     return p;
2707 }
2708
2709 ZOOM_API(void)
2710     ZOOM_package_destroy(ZOOM_package p)
2711 {
2712     if (!p)
2713         return;
2714     (p->refcount)--;
2715     if (p->refcount == 0)
2716     {
2717         odr_destroy (p->odr_out);
2718         xfree (p->buf_out);
2719
2720         ZOOM_options_destroy (p->options);
2721         xfree (p);
2722     }
2723 }
2724
2725 ZOOM_API(const char *)
2726 ZOOM_package_option_get (ZOOM_package p, const char *key)
2727 {
2728     return ZOOM_options_get (p->options, key);
2729 }
2730
2731
2732 ZOOM_API(void)
2733 ZOOM_package_option_set (ZOOM_package p, const char *key,
2734                               const char *val)
2735 {
2736     ZOOM_options_set (p->options, key, val);
2737 }
2738
2739 static int ZOOM_connection_exec_task (ZOOM_connection c)
2740 {
2741     ZOOM_task task = c->tasks;
2742     zoom_ret ret = zoom_complete;
2743
2744     if (!task)
2745     {
2746         yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task task=<null>");
2747         return 0;
2748     }
2749     yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task type=%d run=%d",
2750              task->which, task->running);
2751     if (c->error != ZOOM_ERROR_NONE)
2752     {
2753         yaz_log (LOG_DEBUG, "remove tasks because of error = %d", c->error);
2754         ZOOM_connection_remove_tasks (c);
2755         return 0;
2756     }
2757     if (task->running)
2758     {
2759         yaz_log (LOG_DEBUG, "task already running");
2760         return 0;
2761     }
2762     task->running = 1;
2763     ret = zoom_complete;
2764     if (c->cs || task->which == ZOOM_TASK_CONNECT)
2765     {
2766         switch (task->which)
2767         {
2768         case ZOOM_TASK_SEARCH:
2769             if (c->proto == PROTO_HTTP)
2770                 ret = ZOOM_connection_srw_send_search(c);
2771             else
2772                 ret = ZOOM_connection_send_search(c);
2773             break;
2774         case ZOOM_TASK_RETRIEVE:
2775             if (c->proto == PROTO_HTTP)
2776                 ret = ZOOM_connection_srw_send_search(c);
2777             else
2778                 ret = send_present (c);
2779             break;
2780         case ZOOM_TASK_CONNECT:
2781             ret = do_connect(c);
2782             break;
2783         case ZOOM_TASK_SCAN:
2784             ret = send_scan(c);
2785             break;
2786         case ZOOM_TASK_PACKAGE:
2787             ret = send_package(c);
2788             break;
2789         case ZOOM_TASK_SORT:
2790             c->tasks->u.sort.resultset->r_sort_spec =
2791                 c->tasks->u.sort.q->sort_spec;
2792             ret = send_sort(c, c->tasks->u.sort.resultset);
2793             break;
2794         }
2795     }
2796     else
2797     {
2798         yaz_log (LOG_DEBUG, "remove tasks because no connection exist");
2799         ZOOM_connection_remove_tasks (c);
2800     }
2801     if (ret == zoom_complete)
2802     {
2803         yaz_log (LOG_DEBUG, "task removed (complete)");
2804         ZOOM_connection_remove_task (c);
2805         return 0;
2806     }
2807     yaz_log (LOG_DEBUG, "task pending");
2808     return 1;
2809 }
2810
2811 static zoom_ret send_sort_present (ZOOM_connection c)
2812 {
2813     zoom_ret r = zoom_complete;
2814
2815     if (c->tasks && c->tasks->which == ZOOM_TASK_SEARCH)
2816         r = send_sort (c, c->tasks->u.search.resultset);
2817     if (r == zoom_complete)
2818         r = send_present (c);
2819     return r;
2820 }
2821
2822 static int es_response (ZOOM_connection c,
2823                         Z_ExtendedServicesResponse *res)
2824 {
2825     if (!c->tasks || c->tasks->which != ZOOM_TASK_PACKAGE)
2826         return 0;
2827     if (res->diagnostics && res->num_diagnostics > 0)
2828         response_diag(c, res->diagnostics[0]);
2829     if (res->taskPackage &&
2830         res->taskPackage->which == Z_External_extendedService)
2831     {
2832         Z_TaskPackage *taskPackage = res->taskPackage->u.extendedService;
2833         Odr_oct *id = taskPackage->targetReference;
2834
2835         if (id)
2836             ZOOM_options_setl (c->tasks->u.package->options,
2837                                "targetReference", (char*) id->buf, id->len);
2838     }
2839     return 1;
2840 }
2841
2842
2843 static void handle_apdu (ZOOM_connection c, Z_APDU *apdu)
2844 {
2845     Z_InitResponse *initrs;
2846
2847     c->mask = 0;
2848     yaz_log (LOG_DEBUG, "recv APDU type=%d", apdu->which);
2849     switch(apdu->which)
2850     {
2851     case Z_APDU_initResponse:
2852         initrs = apdu->u.initResponse;
2853         ZOOM_connection_option_set(c, "serverImplementationId",
2854                                    initrs->implementationId ?
2855                                    initrs->implementationId : "");
2856         ZOOM_connection_option_set(c, "serverImplementationName",
2857                                    initrs->implementationName ?
2858                                    initrs->implementationName : "");
2859         ZOOM_connection_option_set(c, "serverImplementationVersion",
2860                                    initrs->implementationVersion ?
2861                                    initrs->implementationVersion : "");
2862         /* Set the three old options too, for old applications */
2863         ZOOM_connection_option_set(c, "targetImplementationId",
2864                                    initrs->implementationId ?
2865                                    initrs->implementationId : "");
2866         ZOOM_connection_option_set(c, "targetImplementationName",
2867                                    initrs->implementationName ?
2868                                    initrs->implementationName : "");
2869         ZOOM_connection_option_set(c, "targetImplementationVersion",
2870                                    initrs->implementationVersion ?
2871                                    initrs->implementationVersion : "");
2872         if (!*initrs->result)
2873         {
2874             set_ZOOM_error(c, ZOOM_ERROR_INIT, 0);
2875         }
2876         else
2877         {
2878             char *cookie =
2879                 yaz_oi_get_string_oidval (&apdu->u.initResponse->otherInfo,
2880                                           VAL_COOKIE, 1, 0);
2881             xfree (c->cookie_in);
2882             c->cookie_in = 0;
2883             if (cookie)
2884                 c->cookie_in = xstrdup(cookie);
2885             if (ODR_MASK_GET(initrs->options, Z_Options_namedResultSets) &&
2886                 ODR_MASK_GET(initrs->protocolVersion, Z_ProtocolVersion_3))
2887                 c->support_named_resultsets = 1;
2888             if (c->tasks)
2889             {
2890                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2891                 ZOOM_connection_remove_task (c);
2892             }
2893             ZOOM_connection_exec_task (c);
2894         }
2895         if (ODR_MASK_GET(initrs->options, Z_Options_negotiationModel))
2896         {
2897             NMEM tmpmem = nmem_create();
2898             Z_CharSetandLanguageNegotiation *p =
2899                 yaz_get_charneg_record(initrs->otherInfo);
2900
2901             if (p)
2902             {
2903                 char *charset=NULL, *lang=NULL;
2904                 int sel;
2905
2906                 yaz_get_response_charneg(tmpmem, p, &charset, &lang, &sel);
2907                 yaz_log(LOG_DEBUG, "Target accepted: charset %s, "
2908                         "language %s, select %d",
2909                         charset ? charset : "none", lang ? lang : "none", sel);
2910                 if (charset)
2911                     ZOOM_connection_option_set (c, "negotiation-charset",
2912                                                 charset);
2913                 if (lang)
2914                     ZOOM_connection_option_set (c, "negotiation-lang",
2915                                                 lang);
2916                 nmem_destroy(tmpmem);
2917             }
2918         }
2919         break;
2920     case Z_APDU_searchResponse:
2921         handle_search_response (c, apdu->u.searchResponse);
2922         if (send_sort_present (c) == zoom_complete)
2923             ZOOM_connection_remove_task (c);
2924         break;
2925     case Z_APDU_presentResponse:
2926         handle_present_response (c, apdu->u.presentResponse);
2927         if (send_present (c) == zoom_complete)
2928             ZOOM_connection_remove_task (c);
2929         break;
2930     case Z_APDU_sortResponse:
2931         sort_response (c, apdu->u.sortResponse);
2932         if (send_present (c) == zoom_complete)
2933             ZOOM_connection_remove_task (c);
2934         break;
2935     case Z_APDU_scanResponse:
2936         scan_response (c, apdu->u.scanResponse);
2937         ZOOM_connection_remove_task (c);
2938         break;
2939     case Z_APDU_extendedServicesResponse:
2940         es_response (c, apdu->u.extendedServicesResponse);
2941         ZOOM_connection_remove_task (c);
2942         break;
2943     case Z_APDU_close:
2944         if (c->reconnect_ok)
2945         {
2946             do_close(c);
2947             c->tasks->running = 0;
2948             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2949         }
2950         else
2951         {
2952             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2953             do_close(c);
2954         }
2955         break;
2956     default:
2957         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2958         do_close(c);
2959     }
2960 }
2961
2962 #if HAVE_XML2
2963 static void handle_srw_response(ZOOM_connection c,
2964                                 Z_SRW_searchRetrieveResponse *res)
2965 {
2966     ZOOM_resultset resultset = 0;
2967     int i;
2968     NMEM nmem;
2969     ZOOM_Event event;
2970
2971     if (!c->tasks)
2972         return;
2973
2974     if (c->tasks->which == ZOOM_TASK_SEARCH)
2975         resultset = c->tasks->u.search.resultset;
2976     else if (c->tasks->which == ZOOM_TASK_RETRIEVE)
2977         resultset = c->tasks->u.retrieve.resultset;
2978     else
2979         return ;
2980
2981     event = ZOOM_Event_create(ZOOM_EVENT_RECV_SEARCH);
2982     ZOOM_connection_put_event(c, event);
2983
2984     resultset->size = 0;
2985
2986     yaz_log(LOG_DEBUG, "got SRW response OK");
2987
2988     if (res->numberOfRecords)
2989         resultset->size = *res->numberOfRecords;
2990
2991     for (i = 0; i<res->num_records; i++)
2992     {
2993         int pos;
2994
2995         Z_NamePlusRecord *npr = (Z_NamePlusRecord *)
2996             odr_malloc(c->odr_in, sizeof(Z_NamePlusRecord));
2997
2998         if (res->records[i].recordPosition &&
2999             *res->records[i].recordPosition > 0)
3000             pos = *res->records[i].recordPosition - 1;
3001         else
3002             pos = resultset->start + i;
3003
3004         npr->databaseName = 0;
3005         npr->which = Z_NamePlusRecord_databaseRecord;
3006         npr->u.databaseRecord = (Z_External *)
3007             odr_malloc(c->odr_in, sizeof(Z_External));
3008         npr->u.databaseRecord->descriptor = 0;
3009         npr->u.databaseRecord->direct_reference =
3010             yaz_oidval_to_z3950oid(c->odr_in, CLASS_RECSYN, VAL_TEXT_XML);
3011         npr->u.databaseRecord->which = Z_External_octet;
3012         npr->u.databaseRecord->u.octet_aligned = (Odr_oct *)
3013             odr_malloc(c->odr_in, sizeof(Odr_oct));
3014         npr->u.databaseRecord->u.octet_aligned->buf =
3015             res->records[i].recordData_buf;
3016         npr->u.databaseRecord->u.octet_aligned->len =
3017             npr->u.databaseRecord->u.octet_aligned->size =
3018             res->records[i].recordData_len;
3019         record_cache_add (resultset, npr, pos);
3020     }
3021     if (res->num_diagnostics > 0)
3022     {
3023         const char *uri = res->diagnostics[0].uri;
3024         if (uri)
3025         {
3026             int code = 0;
3027             const char *cp;
3028             if ((cp = strrchr(uri, '/')))
3029                 code = atoi(cp+1);
3030             set_dset_error(c, code, uri,
3031                            res->diagnostics[0].details, 0);
3032         }
3033     }
3034     nmem = odr_extract_mem(c->odr_in);
3035     nmem_transfer(resultset->odr->mem, nmem);
3036     nmem_destroy(nmem);
3037 }
3038 #endif
3039
3040 #if HAVE_XML2
3041 static void handle_http(ZOOM_connection c, Z_HTTP_Response *hres)
3042 {
3043     int ret = -1;
3044     const char *content_type = z_HTTP_header_lookup(hres->headers,
3045                                                     "Content-Type");
3046     const char *connection_head = z_HTTP_header_lookup(hres->headers,
3047                                                        "Connection");
3048     c->mask = 0;
3049     yaz_log (LOG_DEBUG, "handle_http");
3050
3051     if (content_type && !yaz_strcmp_del("text/xml", content_type, "; "))
3052     {
3053         Z_SOAP *soap_package = 0;
3054         ODR o = c->odr_in;
3055         Z_SOAP_Handler soap_handlers[2] = {
3056             {"http://www.loc.gov/zing/srw/", 0,
3057              (Z_SOAP_fun) yaz_srw_codec},
3058             {0, 0, 0}
3059         };
3060         ret = z_soap_codec(o, &soap_package,
3061                            &hres->content_buf, &hres->content_len,
3062                            soap_handlers);
3063         if (!ret && soap_package->which == Z_SOAP_generic &&
3064             soap_package->u.generic->no == 0)
3065         {
3066             Z_SRW_PDU *sr = soap_package->u.generic->p;
3067             if (sr->which == Z_SRW_searchRetrieve_response)
3068                 handle_srw_response(c, sr->u.response);
3069             else
3070                 ret = -1;
3071         }
3072         else if (!ret && (soap_package->which == Z_SOAP_fault
3073                           || soap_package->which == Z_SOAP_error))
3074         {
3075             set_HTTP_error(c, hres->code,
3076                            soap_package->u.fault->fault_code,
3077                            soap_package->u.fault->fault_string);
3078         }
3079         else
3080             ret = -1;
3081     }
3082     if (ret)
3083     {
3084         if (hres->code != 200)
3085             set_HTTP_error(c, hres->code, 0, 0);
3086         else
3087             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
3088         do_close (c);
3089     }
3090     ZOOM_connection_remove_task(c);
3091     if (!strcmp(hres->version, "1.0"))
3092     {
3093         /* HTTP 1.0: only if Keep-Alive we stay alive.. */
3094         if (!connection_head || strcmp(connection_head, "Keep-Alive"))
3095             do_close(c);
3096     }
3097     else
3098     {
3099         /* HTTP 1.1: only if no close we stay alive .. */
3100         if (connection_head && !strcmp(connection_head, "close"))
3101             do_close(c);
3102     }
3103 }
3104 #endif
3105
3106 static int do_read (ZOOM_connection c)
3107 {
3108     int r, more;
3109     ZOOM_Event event;
3110
3111     event = ZOOM_Event_create (ZOOM_EVENT_RECV_DATA);
3112     ZOOM_connection_put_event (c, event);
3113
3114     r = cs_get (c->cs, &c->buf_in, &c->len_in);
3115     more = cs_more(c->cs);
3116     yaz_log (LOG_DEBUG, "do_read len=%d more=%d", r, more);
3117     if (r == 1)
3118         return 0;
3119     if (r <= 0)
3120     {
3121         if (c->reconnect_ok)
3122         {
3123             do_close (c);
3124             c->reconnect_ok = 0;
3125             yaz_log (LOG_DEBUG, "reconnect read");
3126             c->tasks->running = 0;
3127             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
3128         }
3129         else
3130         {
3131             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
3132             do_close (c);
3133         }
3134     }
3135     else
3136     {
3137         Z_GDU *gdu;
3138         ZOOM_Event event;
3139
3140         odr_reset (c->odr_in);
3141         odr_setbuf (c->odr_in, c->buf_in, r, 0);
3142         event = ZOOM_Event_create (ZOOM_EVENT_RECV_APDU);
3143         ZOOM_connection_put_event (c, event);
3144
3145         if (!z_GDU (c->odr_in, &gdu, 0, 0))
3146         {
3147             int x;
3148             int err = odr_geterrorx(c->odr_in, &x);
3149             char msg[60];
3150             const char *element = odr_getelement(c->odr_in);
3151             sprintf (msg, "ODR code %d:%d element=%-20s",
3152                      err, x, element ? element : "<unknown>");
3153             set_ZOOM_error(c, ZOOM_ERROR_DECODE, msg);
3154             do_close (c);
3155         }
3156         else if (gdu->which == Z_GDU_Z3950)
3157             handle_apdu (c, gdu->u.z3950);
3158         else if (gdu->which == Z_GDU_HTTP_Response)
3159         {
3160 #if HAVE_XML2
3161             handle_http (c, gdu->u.HTTP_Response);
3162 #else
3163             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
3164             do_close (c);
3165 #endif
3166         }
3167         c->reconnect_ok = 0;
3168     }
3169     return 1;
3170 }
3171
3172 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out)
3173 {
3174     int r;
3175     ZOOM_Event event;
3176
3177     event = ZOOM_Event_create(ZOOM_EVENT_SEND_DATA);
3178     ZOOM_connection_put_event (c, event);
3179
3180     yaz_log (LOG_DEBUG, "do_write_ex len=%d", len_out);
3181     if ((r=cs_put (c->cs, buf_out, len_out)) < 0)
3182     {
3183         if (c->reconnect_ok)
3184         {
3185             do_close (c);
3186             c->reconnect_ok = 0;
3187             yaz_log (LOG_DEBUG, "reconnect write");
3188             c->tasks->running = 0;
3189             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
3190             return zoom_pending;
3191         }
3192         if (c->state == STATE_CONNECTING)
3193             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
3194         else
3195             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
3196         do_close (c);
3197         return zoom_complete;
3198     }
3199     else if (r == 1)
3200     {
3201         c->mask = ZOOM_SELECT_EXCEPT;
3202         if (c->cs->io_pending & CS_WANT_WRITE)
3203             c->mask += ZOOM_SELECT_WRITE;
3204         if (c->cs->io_pending & CS_WANT_READ)
3205             c->mask += ZOOM_SELECT_READ;
3206         yaz_log (LOG_DEBUG, "do_write_ex 1 mask=%d", c->mask);
3207     }
3208     else
3209     {
3210         c->mask = ZOOM_SELECT_READ|ZOOM_SELECT_EXCEPT;
3211         yaz_log (LOG_DEBUG, "do_write_ex 2 mask=%d", c->mask);
3212     }
3213     return zoom_pending;
3214 }
3215
3216 static zoom_ret do_write(ZOOM_connection c)
3217 {
3218     return do_write_ex (c, c->buf_out, c->len_out);
3219 }
3220
3221
3222 ZOOM_API(const char *)
3223 ZOOM_connection_option_get (ZOOM_connection c, const char *key)
3224 {
3225     return ZOOM_options_get (c->options, key);
3226 }
3227
3228 ZOOM_API(void)
3229 ZOOM_connection_option_set (ZOOM_connection c, const char *key,
3230                                   const char *val)
3231 {
3232     ZOOM_options_set (c->options, key, val);
3233 }
3234
3235 ZOOM_API(const char *)
3236 ZOOM_resultset_option_get (ZOOM_resultset r, const char *key)
3237 {
3238     return ZOOM_options_get (r->options, key);
3239 }
3240
3241 ZOOM_API(void)
3242 ZOOM_resultset_option_set (ZOOM_resultset r, const char *key,
3243                                   const char *val)
3244 {
3245     ZOOM_options_set (r->options, key, val);
3246 }
3247
3248
3249 ZOOM_API(int)
3250 ZOOM_connection_errcode (ZOOM_connection c)
3251 {
3252     return ZOOM_connection_error (c, 0, 0);
3253 }
3254
3255 ZOOM_API(const char *)
3256 ZOOM_connection_errmsg (ZOOM_connection c)
3257 {
3258     const char *msg;
3259     ZOOM_connection_error (c, &msg, 0);
3260     return msg;
3261 }
3262
3263 ZOOM_API(const char *)
3264 ZOOM_connection_addinfo (ZOOM_connection c)
3265 {
3266     const char *addinfo;
3267     ZOOM_connection_error (c, 0, &addinfo);
3268     return addinfo;
3269 }
3270
3271 ZOOM_API(const char *)
3272 ZOOM_diag_str (int error)
3273 {
3274     switch (error)
3275     {
3276     case ZOOM_ERROR_NONE:
3277         return "No error";
3278     case ZOOM_ERROR_CONNECT:
3279         return "Connect failed";
3280     case ZOOM_ERROR_MEMORY:
3281         return "Out of memory";
3282     case ZOOM_ERROR_ENCODE:
3283         return "Encoding failed";
3284     case ZOOM_ERROR_DECODE:
3285         return "Decoding failed";
3286     case ZOOM_ERROR_CONNECTION_LOST:
3287         return "Connection lost";
3288     case ZOOM_ERROR_INIT:
3289         return "Init rejected";
3290     case ZOOM_ERROR_INTERNAL:
3291         return "Internal failure";
3292     case ZOOM_ERROR_TIMEOUT:
3293         return "Timeout";
3294     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
3295         return "Unsupported protocol";
3296     case ZOOM_ERROR_UNSUPPORTED_QUERY:
3297         return "Unsupported query type";
3298     case ZOOM_ERROR_INVALID_QUERY:
3299         return "Invalid query";
3300     default:
3301         return diagbib1_str (error);
3302     }
3303 }
3304
3305 ZOOM_API(int)
3306 ZOOM_connection_error_x (ZOOM_connection c, const char **cp,
3307                          const char **addinfo, const char **diagset)
3308 {
3309     int error = c->error;
3310     if (cp)
3311     {
3312         if (!c->diagset || !strcmp(c->diagset, "ZOOM"))
3313             *cp = ZOOM_diag_str(error);
3314         else if (!strcmp(c->diagset, "HTTP"))
3315             *cp = z_HTTP_errmsg(c->error);
3316         else if (!strcmp(c->diagset, "Bib-1"))
3317             *cp = ZOOM_diag_str(error);
3318         else if (!strcmp(c->diagset, "info:srw/diagnostic/1"))
3319             *cp = yaz_diag_srw_str(c->error);
3320         else
3321             *cp = "Unknown error and diagnostic set";
3322     }
3323     if (addinfo)
3324         *addinfo = c->addinfo ? c->addinfo : "";
3325     if (diagset)
3326         *diagset = c->diagset ? c->diagset : "";
3327     return c->error;
3328 }
3329
3330 ZOOM_API(int)
3331 ZOOM_connection_error (ZOOM_connection c, const char **cp,
3332                        const char **addinfo)
3333 {
3334     return ZOOM_connection_error_x(c, cp, addinfo, 0);
3335 }
3336
3337 static int ZOOM_connection_do_io(ZOOM_connection c, int mask)
3338 {
3339     ZOOM_Event event = 0;
3340     int r = cs_look(c->cs);
3341     yaz_log (LOG_DEBUG, "ZOOM_connection_do_io c=%p mask=%d cs_look=%d",
3342              c, mask, r);
3343
3344     if (r == CS_NONE)
3345     {
3346         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
3347         set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
3348         do_close (c);
3349         ZOOM_connection_put_event (c, event);
3350     }
3351     else if (r == CS_CONNECT)
3352     {
3353         int ret;
3354         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
3355
3356         ret = cs_rcvconnect (c->cs);
3357         yaz_log (LOG_DEBUG, "cs_rcvconnect returned %d", ret);
3358         if (ret == 1)
3359         {
3360             c->mask = ZOOM_SELECT_EXCEPT;
3361             if (c->cs->io_pending & CS_WANT_WRITE)
3362                 c->mask += ZOOM_SELECT_WRITE;
3363             if (c->cs->io_pending & CS_WANT_READ)
3364                 c->mask += ZOOM_SELECT_READ;
3365             ZOOM_connection_put_event (c, event);
3366         }
3367         else if (ret == 0)
3368         {
3369             ZOOM_connection_put_event (c, event);
3370             if (c->proto == PROTO_Z3950)
3371                 ZOOM_connection_send_init(c);
3372             else
3373             {
3374                 /* no init request for SRW .. */
3375                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
3376                 ZOOM_connection_remove_task (c);
3377                 c->mask = 0;
3378                 ZOOM_connection_exec_task (c);
3379             }
3380             c->state = STATE_ESTABLISHED;
3381         }
3382         else
3383         {
3384             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
3385             do_close (c);
3386             ZOOM_connection_put_event (c, event);
3387         }
3388     }
3389     else
3390     {
3391         if (mask & ZOOM_SELECT_READ)
3392             do_read (c);
3393         if (c->cs && (mask & ZOOM_SELECT_WRITE))
3394             do_write (c);
3395     }
3396     return 1;
3397 }
3398
3399 ZOOM_API(int)
3400 ZOOM_connection_last_event(ZOOM_connection cs)
3401 {
3402     if (!cs)
3403         return ZOOM_EVENT_NONE;
3404     return cs->last_event;
3405 }
3406
3407 ZOOM_API(int)
3408 ZOOM_event (int no, ZOOM_connection *cs)
3409 {
3410     int timeout = 5000;
3411 #if HAVE_SYS_POLL_H
3412     struct pollfd pollfds[1024];
3413     ZOOM_connection poll_cs[1024];
3414 #else
3415     struct timeval tv;
3416     fd_set input, output, except;
3417 #endif
3418     int i, r, nfds;
3419     int max_fd = 0;
3420
3421     for (i = 0; i<no; i++)
3422     {
3423         ZOOM_connection c = cs[i];
3424         ZOOM_Event event;
3425         if (c && (event = ZOOM_connection_get_event(c)))
3426         {
3427             ZOOM_Event_destroy (event);
3428             return i+1;
3429         }
3430     }
3431     for (i = 0; i<no; i++)
3432     {
3433         ZOOM_connection c = cs[i];
3434         ZOOM_Event event;
3435         if (c && ZOOM_connection_exec_task (c))
3436         {
3437             if ((event = ZOOM_connection_get_event(c)))
3438             {
3439                 ZOOM_Event_destroy (event);
3440                 return i+1;
3441             }
3442         }
3443     }
3444 #if HAVE_SYS_POLL_H
3445
3446 #else
3447     FD_ZERO (&input);
3448     FD_ZERO (&output);
3449     FD_ZERO (&except);
3450 #endif
3451     nfds = 0;
3452     for (i = 0; i<no; i++)
3453     {
3454         ZOOM_connection c = cs[i];
3455         int fd, mask;
3456         int this_timeout;
3457
3458         if (!c)
3459             continue;
3460         fd = z3950_connection_socket(c);
3461         mask = z3950_connection_mask(c);
3462
3463         if (fd == -1)
3464             continue;
3465         if (max_fd < fd)
3466             max_fd = fd;
3467
3468         this_timeout = ZOOM_options_get_int (c->options, "timeout", -1);
3469         if (this_timeout != -1 && this_timeout < timeout)
3470             timeout = this_timeout;
3471 #if HAVE_SYS_POLL_H
3472         if (mask)
3473         {
3474             short poll_events = 0;
3475
3476             if (mask & ZOOM_SELECT_READ)
3477                 poll_events += POLLIN;
3478             if (mask & ZOOM_SELECT_WRITE)
3479                 poll_events += POLLOUT;
3480             if (mask & ZOOM_SELECT_EXCEPT)
3481                 poll_events += POLLERR;
3482             pollfds[nfds].fd = fd;
3483             pollfds[nfds].events = poll_events;
3484             pollfds[nfds].revents = 0;
3485             poll_cs[nfds] = c;
3486             nfds++;
3487         }
3488 #else
3489         if (mask & ZOOM_SELECT_READ)
3490         {
3491             FD_SET (fd, &input);
3492             nfds++;
3493         }
3494         if (mask & ZOOM_SELECT_WRITE)
3495         {
3496             FD_SET (fd, &output);
3497             nfds++;
3498         }
3499         if (mask & ZOOM_SELECT_EXCEPT)
3500         {
3501             FD_SET (fd, &except);
3502             nfds++;
3503         }
3504 #endif
3505     }
3506     if (timeout >= 5000)
3507         timeout = 30;
3508
3509     if (!nfds)
3510         return 0;
3511
3512 #if HAVE_SYS_POLL_H
3513     r = poll (pollfds, nfds, timeout * 1000);
3514     for (i = 0; i<nfds; i++)
3515     {
3516         ZOOM_connection c = poll_cs[i];
3517         if (r && c->mask)
3518         {
3519             int mask = 0;
3520             if (pollfds[i].revents & POLLIN)
3521                 mask += ZOOM_SELECT_READ;
3522             if (pollfds[i].revents & POLLOUT)
3523                 mask += ZOOM_SELECT_WRITE;
3524             if (pollfds[i].revents & POLLERR)
3525                 mask += ZOOM_SELECT_EXCEPT;
3526             if (mask)
3527                 ZOOM_connection_do_io(c, mask);
3528         }
3529         else if (r == 0 && c->mask)
3530         {
3531             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
3532             /* timeout and this connection was waiting */
3533             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
3534             do_close (c);
3535             ZOOM_connection_put_event(c, event);
3536         }
3537     }
3538 #else
3539     tv.tv_sec = timeout;
3540     tv.tv_usec = 0;
3541     yaz_log (LOG_DEBUG, "select start");
3542     r = select (max_fd+1, &input, &output, &except, &tv);
3543     yaz_log (LOG_DEBUG, "select stop, returned r=%d", r);
3544     for (i = 0; i<no; i++)
3545     {
3546         ZOOM_connection c = cs[i];
3547         int fd, mask;
3548
3549         if (!c)
3550             continue;
3551         fd = z3950_connection_socket(c);
3552         mask = 0;
3553         if (r && c->mask)
3554         {
3555             /* no timeout and real socket */
3556             if (FD_ISSET(fd, &input))
3557                 mask += ZOOM_SELECT_READ;
3558             if (FD_ISSET(fd, &output))
3559                 mask += ZOOM_SELECT_WRITE;
3560             if (FD_ISSET(fd, &except))
3561                 mask += ZOOM_SELECT_EXCEPT;
3562             if (mask)
3563                 ZOOM_connection_do_io(c, mask);
3564         }
3565         if (r == 0 && c->mask)
3566         {
3567             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
3568             /* timeout and this connection was waiting */
3569             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
3570             do_close (c);
3571             yaz_log (LOG_DEBUG, "timeout");
3572             ZOOM_connection_put_event(c, event);
3573         }
3574     }
3575 #endif
3576     for (i = 0; i<no; i++)
3577     {
3578         ZOOM_connection c = cs[i];
3579         ZOOM_Event event;
3580         if (c && (event = ZOOM_connection_get_event(c)))
3581         {
3582             ZOOM_Event_destroy (event);
3583             return i+1;
3584         }
3585     }
3586     return 0;
3587 }