src/zoom-c.c

   1 /*
   2  * Copyright (c) 2000-2003, Index Data
   3  * See the file LICENSE for details.
   4  *
   5  * $Id: zoom-c.c,v 1.9 2003-11-26 16:56:00 mike 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     xfree (c->addinfo);
  94     c->addinfo = 0;
  95     c->error = error;
  96     c->diagset = dset;
  97     if (addinfo && addinfo2)
  98     {
  99         c->addinfo = xmalloc(strlen(addinfo) + strlen(addinfo2) + 2);
 100         strcpy(c->addinfo, addinfo);
 101         strcat(c->addinfo, addinfo2);
 102     }
 103     else if (addinfo)
 104         c->addinfo = xstrdup(addinfo);
 105     if (error)
 106         yaz_log(LOG_DEBUG, "Error %s %s:%d %s %s",
 107                 c->host_port ? c->host_port : "<>", dset, error,
 108                 addinfo ? addinfo : "",
 109                 addinfo2 ? addinfo2 : "");
 110 }
 111
 112 #if HAVE_XML2
 113 static void set_HTTP_error (ZOOM_connection c, int error,
 114                             const char *addinfo, const char *addinfo2)
 115 {
 116     set_dset_error(c, error, "HTTP", addinfo, addinfo2);
 117 }
 118 #endif
 119
 120 static void set_ZOOM_error (ZOOM_connection c, int error,
 121                             const char *addinfo)
 122 {
 123     set_dset_error(c, error, "ZOOM", addinfo, 0);
 124 }
 125
 126 static void clear_error (ZOOM_connection c)
 127 {
 128
 129     switch (c->error)
 130     {
 131     case ZOOM_ERROR_CONNECT:
 132     case ZOOM_ERROR_MEMORY:
 133     case ZOOM_ERROR_DECODE:
 134     case ZOOM_ERROR_CONNECTION_LOST:
 135     case ZOOM_ERROR_INIT:
 136     case ZOOM_ERROR_INTERNAL:
 137     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
 138         break;
 139     default:
 140         set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 141     }
 142 }
 143
 144 ZOOM_task ZOOM_connection_add_task (ZOOM_connection c, int which)
 145 {
 146     ZOOM_task *taskp = &c->tasks;
 147     while (*taskp)
 148         taskp = &(*taskp)->next;
 149     *taskp = (ZOOM_task) xmalloc (sizeof(**taskp));
 150     (*taskp)->running = 0;
 151     (*taskp)->which = which;
 152     (*taskp)->next = 0;
 153     clear_error (c);
 154     return *taskp;
 155 }
 156
 157 ZOOM_task ZOOM_connection_insert_task (ZOOM_connection c, int which)
 158 {
 159     ZOOM_task task = (ZOOM_task) xmalloc (sizeof(*task));
 160
 161     task->next = c->tasks;
 162     c->tasks = task;
 163
 164     task->running = 0;
 165     task->which = which;
 166     clear_error (c);
 167     return task;
 168 }
 169
 170 void ZOOM_connection_remove_task (ZOOM_connection c)
 171 {
 172     ZOOM_task task = c->tasks;
 173
 174     if (task)
 175     {
 176         c->tasks = task->next;
 177         switch (task->which)
 178         {
 179         case ZOOM_TASK_SEARCH:
 180
 181             ZOOM_resultset_destroy (task->u.search.resultset);
 182             break;
 183         case ZOOM_TASK_RETRIEVE:
 184             ZOOM_resultset_destroy (task->u.retrieve.resultset);
 185             break;
 186         case ZOOM_TASK_CONNECT:
 187             break;
 188         case ZOOM_TASK_SCAN:
 189             ZOOM_scanset_destroy (task->u.scan.scan);
 190             break;
 191         case ZOOM_TASK_PACKAGE:
 192             ZOOM_package_destroy (task->u.package);
 193             break;
 194         default:
 195             assert (0);
 196         }
 197         xfree (task);
 198     }
 199 }
 200
 201 static int ZOOM_connection_exec_task (ZOOM_connection c);
 202
 203 void ZOOM_connection_remove_tasks (ZOOM_connection c)
 204 {
 205     while (c->tasks)
 206         ZOOM_connection_remove_task(c);
 207 }
 208
 209 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos);
 210
 211 ZOOM_API(ZOOM_connection)
 212 ZOOM_connection_create (ZOOM_options options)
 213 {
 214     ZOOM_connection c = (ZOOM_connection) xmalloc (sizeof(*c));
 215
 216     c->proto = PROTO_Z3950;
 217     c->cs = 0;
 218     c->mask = 0;
 219     c->reconnect_ok = 0;
 220     c->state = STATE_IDLE;
 221     c->addinfo = 0;
 222     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 223     c->buf_in = 0;
 224     c->len_in = 0;
 225     c->buf_out = 0;
 226     c->len_out = 0;
 227     c->resultsets = 0;
 228
 229     c->options = ZOOM_options_create_with_parent(options);
 230
 231     c->host_port = 0;
 232     c->path = 0;
 233     c->proxy = 0;
 234
 235     c->charset = c->lang = 0;
 236
 237     c->cookie_out = 0;
 238     c->cookie_in = 0;
 239     c->client_IP = 0;
 240     c->tasks = 0;
 241
 242     c->odr_in = odr_createmem (ODR_DECODE);
 243     c->odr_out = odr_createmem (ODR_ENCODE);
 244
 245     c->async = 0;
 246     c->support_named_resultsets = 0;
 247     c->last_event = ZOOM_EVENT_NONE;
 248
 249     c->m_queue_front = 0;
 250     c->m_queue_back = 0;
 251     return c;
 252 }
 253
 254 /* set database names. Take local databases (if set); otherwise
 255    take databases given in ZURL (if set); otherwise use Default */
 256 static char **set_DatabaseNames (ZOOM_connection con, ZOOM_options options,
 257                                  int *num)
 258 {
 259     char **databaseNames;
 260     const char *c;
 261     int no = 2;
 262     const char *cp = ZOOM_options_get (options, "databaseName");
 263
 264     if (!cp || !*cp)
 265     {
 266         if (strncmp (con->host_port, "unix:", 5) == 0)
 267             cp = strchr (con->host_port+5, ':');
 268         else
 269             cp = strchr (con->host_port, '/');
 270         if (cp)
 271             cp++;
 272     }
 273     if (cp)
 274     {
 275         c = cp;
 276         while ((c = strchr(c, '+')))
 277         {
 278             c++;
 279             no++;
 280         }
 281     }
 282     else
 283         cp = "Default";
 284     databaseNames = (char**)
 285         odr_malloc (con->odr_out, no * sizeof(*databaseNames));
 286     no = 0;
 287     while (*cp)
 288     {
 289         c = strchr (cp, '+');
 290         if (!c)
 291             c = cp + strlen(cp);
 292         else if (c == cp)
 293         {
 294             cp++;
 295             continue;
 296         }
 297         /* cp ptr to first char of db name, c is char
 298            following db name */
 299         databaseNames[no] = (char*) odr_malloc (con->odr_out, 1+c-cp);
 300         memcpy (databaseNames[no], cp, c-cp);
 301         databaseNames[no++][c-cp] = '\0';
 302         cp = c;
 303         if (*cp)
 304             cp++;
 305     }
 306     databaseNames[no] = NULL;
 307     *num = no;
 308     return databaseNames;
 309 }
 310
 311 ZOOM_API(ZOOM_connection)
 312 ZOOM_connection_new (const char *host, int portnum)
 313 {
 314     ZOOM_connection c = ZOOM_connection_create (0);
 315
 316     ZOOM_connection_connect (c, host, portnum);
 317     return c;
 318 }
 319
 320 ZOOM_API(void)
 321 ZOOM_connection_connect(ZOOM_connection c,
 322                         const char *host, int portnum)
 323 {
 324     const char *val;
 325     ZOOM_task task;
 326
 327     if (c->cs)
 328     {
 329         yaz_log (LOG_DEBUG, "reconnect");
 330         c->reconnect_ok = 1;
 331         return;
 332     }
 333     yaz_log(LOG_DEBUG, "connect");
 334     xfree (c->proxy);
 335     val = ZOOM_options_get (c->options, "proxy");
 336     if (val && *val)
 337         c->proxy = xstrdup (val);
 338     else
 339         c->proxy = 0;
 340
 341     xfree (c->charset);
 342     val = ZOOM_options_get (c->options, "charset");
 343     if (val && *val)
 344         c->charset = xstrdup (val);
 345     else
 346         c->charset = 0;
 347
 348     xfree (c->lang);
 349     val = ZOOM_options_get (c->options, "lang");
 350     if (val && *val)
 351         c->lang = xstrdup (val);
 352     else
 353         c->lang = 0;
 354
 355     xfree (c->host_port);
 356     if (portnum)
 357     {
 358         char hostn[128];
 359         sprintf (hostn, "%.80s:%d", host, portnum);
 360         c->host_port = xstrdup(hostn);
 361     }
 362     else
 363         c->host_port = xstrdup(host);
 364
 365     ZOOM_options_set(c->options, "host", c->host_port);
 366
 367     val = ZOOM_options_get (c->options, "cookie");
 368     if (val && *val)
 369         c->cookie_out = xstrdup (val);
 370
 371     val = ZOOM_options_get (c->options, "clientIP");
 372     if (val && *val)
 373         c->client_IP = xstrdup (val);
 374
 375     c->async = ZOOM_options_get_bool (c->options, "async", 0);
 376
 377     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 378
 379     task = ZOOM_connection_add_task (c, ZOOM_TASK_CONNECT);
 380
 381     if (!c->async)
 382     {
 383         while (ZOOM_event (1, &c))
 384             ;
 385     }
 386 }
 387
 388 ZOOM_API(ZOOM_query)
 389 ZOOM_query_create(void)
 390 {
 391     ZOOM_query s = (ZOOM_query) xmalloc (sizeof(*s));
 392
 393     s->refcount = 1;
 394     s->z_query = 0;
 395     s->sort_spec = 0;
 396     s->odr = odr_createmem (ODR_ENCODE);
 397     s->query_string = 0;
 398
 399     return s;
 400 }
 401
 402 ZOOM_API(void)
 403 ZOOM_query_destroy(ZOOM_query s)
 404 {
 405     if (!s)
 406         return;
 407
 408     (s->refcount)--;
 409     yaz_log (LOG_DEBUG, "ZOOM_query_destroy count=%d", s->refcount);
 410     if (s->refcount == 0)
 411     {
 412         odr_destroy (s->odr);
 413         xfree (s);
 414     }
 415 }
 416
 417 ZOOM_API(int)
 418 ZOOM_query_prefix(ZOOM_query s, const char *str)
 419 {
 420     s->query_string = odr_strdup(s->odr, str);
 421     s->z_query = (Z_Query *) odr_malloc (s->odr, sizeof(*s->z_query));
 422     s->z_query->which = Z_Query_type_1;
 423     s->z_query->u.type_1 =  p_query_rpn(s->odr, PROTO_Z3950, str);
 424     if (!s->z_query->u.type_1)
 425         return -1;
 426     return 0;
 427 }
 428
 429 ZOOM_API(int)
 430 ZOOM_query_cql(ZOOM_query s, const char *str)
 431 {
 432     Z_External *ext;
 433
 434     s->query_string = odr_strdup(s->odr, str);
 435
 436     ext = (Z_External *) odr_malloc(s->odr, sizeof(*ext));
 437     ext->direct_reference = odr_getoidbystr(s->odr, "1.2.840.10003.16.2");
 438     ext->indirect_reference = 0;
 439     ext->descriptor = 0;
 440     ext->which = Z_External_CQL;
 441     ext->u.cql = s->query_string;
 442
 443     s->z_query = (Z_Query *) odr_malloc (s->odr, sizeof(*s->z_query));
 444     s->z_query->which = Z_Query_type_104;
 445     s->z_query->u.type_104 =  ext;
 446
 447     return 0;
 448 }
 449
 450 ZOOM_API(int)
 451 ZOOM_query_sortby(ZOOM_query s, const char *criteria)
 452 {
 453     s->sort_spec = yaz_sort_spec (s->odr, criteria);
 454     if (!s->sort_spec)
 455         return -1;
 456     return 0;
 457 }
 458
 459 static zoom_ret do_write(ZOOM_connection c);
 460
 461 ZOOM_API(void)
 462 ZOOM_connection_destroy(ZOOM_connection c)
 463 {
 464     ZOOM_resultset r;
 465     if (!c)
 466         return;
 467     if (c->cs)
 468         cs_close (c->cs);
 469     for (r = c->resultsets; r; r = r->next)
 470         r->connection = 0;
 471
 472     xfree (c->buf_in);
 473     xfree (c->addinfo);
 474     odr_destroy (c->odr_in);
 475     odr_destroy (c->odr_out);
 476     ZOOM_options_destroy (c->options);
 477     ZOOM_connection_remove_tasks (c);
 478     xfree (c->host_port);
 479     xfree (c->path);
 480     xfree (c->proxy);
 481     xfree (c->charset);
 482     xfree (c->lang);
 483     xfree (c->cookie_out);
 484     xfree (c->cookie_in);
 485     xfree (c->client_IP);
 486     xfree (c);
 487 }
 488
 489 void ZOOM_resultset_addref (ZOOM_resultset r)
 490 {
 491     if (r)
 492     {
 493         (r->refcount)++;
 494         yaz_log (LOG_DEBUG, "ZOOM_resultset_addref r=%p count=%d",
 495                  r, r->refcount);
 496     }
 497 }
 498 ZOOM_resultset ZOOM_resultset_create ()
 499 {
 500     ZOOM_resultset r = (ZOOM_resultset) xmalloc (sizeof(*r));
 501
 502     yaz_log (LOG_DEBUG, "ZOOM_resultset_create r = %p", r);
 503     r->refcount = 1;
 504     r->size = 0;
 505     r->odr = odr_createmem (ODR_ENCODE);
 506     r->start = 0;
 507     r->piggyback = 1;
 508     r->setname = 0;
 509     r->schema = 0;
 510     r->count = 0;
 511     r->step = 0;
 512     r->record_cache = 0;
 513     r->r_sort_spec = 0;
 514     r->query = 0;
 515     r->connection = 0;
 516     r->next = 0;
 517     return r;
 518 }
 519
 520 ZOOM_API(ZOOM_resultset)
 521 ZOOM_connection_search_pqf(ZOOM_connection c, const char *q)
 522 {
 523     ZOOM_resultset r;
 524     ZOOM_query s = ZOOM_query_create();
 525
 526     ZOOM_query_prefix (s, q);
 527
 528     r = ZOOM_connection_search (c, s);
 529     ZOOM_query_destroy (s);
 530     return r;
 531 }
 532
 533 ZOOM_API(ZOOM_resultset)
 534 ZOOM_connection_search(ZOOM_connection c, ZOOM_query q)
 535 {
 536     ZOOM_resultset r = ZOOM_resultset_create ();
 537     ZOOM_task task;
 538     const char *cp;
 539
 540     r->r_sort_spec = q->sort_spec;
 541     r->query = q;
 542
 543     r->options = ZOOM_options_create_with_parent(c->options);
 544
 545     r->start = ZOOM_options_get_int(r->options, "start", 0);
 546     r->count = ZOOM_options_get_int(r->options, "count", 0);
 547     {
 548         /* If "presentChunk" is defined use that; otherwise "step" */
 549         const char *cp = ZOOM_options_get (r->options, "presentChunk");
 550         r->step = ZOOM_options_get_int(r->options,
 551                                        (cp != 0 ? "presentChunk": "step"), 0);
 552     }
 553     r->piggyback = ZOOM_options_get_bool (r->options, "piggyback", 1);
 554     cp = ZOOM_options_get (r->options, "setname");
 555     if (cp)
 556         r->setname = xstrdup(cp);
 557     cp = ZOOM_options_get (r->options, "schema");
 558     if (cp)
 559         r->schema = xstrdup(cp);
 560
 561     r->connection = c;
 562
 563     r->next = c->resultsets;
 564     c->resultsets = r;
 565
 566     if (c->host_port && c->proto == PROTO_HTTP)
 567     {
 568         if (!c->cs)
 569         {
 570             yaz_log(LOG_DEBUG, "NO COMSTACK");
 571             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 572         }
 573         else
 574         {
 575             yaz_log(LOG_DEBUG, "PREPARE FOR RECONNECT");
 576             c->reconnect_ok = 1;
 577         }
 578     }
 579
 580     task = ZOOM_connection_add_task (c, ZOOM_TASK_SEARCH);
 581     task->u.search.resultset = r;
 582     ZOOM_resultset_addref (r);
 583
 584     (q->refcount)++;
 585
 586     if (!c->async)
 587     {
 588         while (ZOOM_event (1, &c))
 589             ;
 590     }
 591     return r;
 592 }
 593
 594 ZOOM_API(void)
 595 ZOOM_resultset_destroy(ZOOM_resultset r)
 596 {
 597     if (!r)
 598         return;
 599     (r->refcount)--;
 600     yaz_log (LOG_DEBUG, "ZOOM_resultset_destroy r = %p count=%d",
 601              r, r->refcount);
 602     if (r->refcount == 0)
 603     {
 604         ZOOM_record_cache rc;
 605
 606         for (rc = r->record_cache; rc; rc = rc->next)
 607         {
 608             if (rc->rec.wrbuf_marc)
 609                 wrbuf_free (rc->rec.wrbuf_marc, 1);
 610             if (rc->rec.wrbuf_iconv)
 611                 wrbuf_free (rc->rec.wrbuf_iconv, 1);
 612             if (rc->rec.wrbuf_opac)
 613                 wrbuf_free (rc->rec.wrbuf_opac, 1);
 614         }
 615         if (r->connection)
 616         {
 617             /* remove ourselves from the resultsets in connection */
 618             ZOOM_resultset *rp = &r->connection->resultsets;
 619             while (1)
 620             {
 621                 assert (*rp);   /* we must be in this list!! */
 622                 if (*rp == r)
 623                 {   /* OK, we're here - take us out of it */
 624                     *rp = (*rp)->next;
 625                     break;
 626                 }
 627                 rp = &(*rp)->next;
 628             }
 629         }
 630         ZOOM_query_destroy (r->query);
 631         ZOOM_options_destroy (r->options);
 632         odr_destroy (r->odr);
 633         xfree (r->setname);
 634         xfree (r->schema);
 635         xfree (r);
 636     }
 637 }
 638
 639 ZOOM_API(size_t)
 640 ZOOM_resultset_size (ZOOM_resultset r)
 641 {
 642     return r->size;
 643 }
 644
 645 static void do_close (ZOOM_connection c)
 646 {
 647     if (c->cs)
 648         cs_close(c->cs);
 649     c->cs = 0;
 650     c->mask = 0;
 651     c->state = STATE_IDLE;
 652 }
 653
 654 static void ZOOM_resultset_retrieve (ZOOM_resultset r,
 655                                      int force_sync, int start, int count)
 656 {
 657     ZOOM_task task;
 658     ZOOM_connection c;
 659     const char *cp;
 660
 661     if (!r)
 662         return;
 663     c = r->connection;
 664     if (!c)
 665         return;
 666
 667     if (c->host_port && c->proto == PROTO_HTTP)
 668     {
 669         if (!c->cs)
 670         {
 671             yaz_log(LOG_DEBUG, "NO COMSTACK");
 672             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 673         }
 674         else
 675         {
 676             yaz_log(LOG_DEBUG, "PREPARE FOR RECONNECT");
 677             c->reconnect_ok = 1;
 678         }
 679     }
 680     task = ZOOM_connection_add_task (c, ZOOM_TASK_RETRIEVE);
 681     task->u.retrieve.resultset = r;
 682     task->u.retrieve.start = start;
 683     task->u.retrieve.count = count;
 684
 685     cp = ZOOM_options_get (r->options, "schema");
 686     if (cp)
 687     {
 688         if (!r->schema || strcmp(r->schema, cp))
 689         {
 690             xfree(r->schema);
 691             r->schema = xstrdup(cp);
 692         }
 693     }
 694
 695     ZOOM_resultset_addref (r);
 696
 697     if (!r->connection->async || force_sync)
 698         while (r->connection && ZOOM_event (1, &r->connection))
 699             ;
 700 }
 701
 702 ZOOM_API(void)
 703 ZOOM_resultset_records (ZOOM_resultset r, ZOOM_record *recs,
 704                         size_t start, size_t count)
 705 {
 706     int force_present = 0;
 707
 708     if (!r)
 709         return ;
 710     if (count && recs)
 711         force_present = 1;
 712     ZOOM_resultset_retrieve (r, force_present, start, count);
 713     if (force_present)
 714     {
 715         size_t i;
 716         for (i = 0; i< count; i++)
 717             recs[i] = ZOOM_resultset_record_immediate (r, i+start);
 718     }
 719 }
 720
 721 static zoom_ret do_connect (ZOOM_connection c)
 722 {
 723     void *add;
 724     const char *effective_host;
 725
 726     if (c->proxy)
 727         effective_host = c->proxy;
 728     else
 729         effective_host = c->host_port;
 730
 731     yaz_log (LOG_DEBUG, "do_connect host=%s", effective_host);
 732
 733     assert (!c->cs);
 734     c->cs = cs_create_host (effective_host, 0, &add);
 735
 736     if (c->cs && c->cs->protocol == PROTO_HTTP)
 737     {
 738 #if HAVE_XML2
 739         const char *path = 0;
 740
 741         c->proto = PROTO_HTTP;
 742         cs_get_host_args(c->host_port, &path);
 743         xfree(c->path);
 744         c->path = xmalloc(strlen(path)+2);
 745         c->path[0] = '/';
 746         strcpy (c->path+1, path);
 747 #else
 748         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_PROTOCOL, "SRW");
 749         do_close(c);
 750         return zoom_complete;
 751 #endif
 752     }
 753     if (c->cs)
 754     {
 755         int ret = cs_connect (c->cs, add);
 756         if (ret == 0)
 757         {
 758             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_CONNECT);
 759             ZOOM_connection_put_event(c, event);
 760             if (c->proto == PROTO_Z3950)
 761                 ZOOM_connection_send_init(c);
 762             else
 763             {
 764                 /* no init request for SRW .. */
 765                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
 766                 ZOOM_connection_remove_task (c);
 767                 c->mask = 0;
 768                 ZOOM_connection_exec_task (c);
 769             }
 770             c->state = STATE_ESTABLISHED;
 771             return zoom_pending;
 772         }
 773         else if (ret > 0)
 774         {
 775             c->state = STATE_CONNECTING;
 776             c->mask = ZOOM_SELECT_EXCEPT;
 777             if (c->cs->io_pending & CS_WANT_WRITE)
 778                 c->mask += ZOOM_SELECT_WRITE;
 779             if (c->cs->io_pending & CS_WANT_READ)
 780                 c->mask += ZOOM_SELECT_READ;
 781             return zoom_pending;
 782         }
 783     }
 784     c->state = STATE_IDLE;
 785     set_ZOOM_error(c, ZOOM_ERROR_CONNECT, effective_host);
 786     return zoom_complete;
 787 }
 788
 789 int z3950_connection_socket(ZOOM_connection c)
 790 {
 791     if (c->cs)
 792         return cs_fileno(c->cs);
 793     return -1;
 794 }
 795
 796 int z3950_connection_mask(ZOOM_connection c)
 797 {
 798     if (c->cs)
 799         return c->mask;
 800     return 0;
 801 }
 802
 803 static void otherInfo_attach (ZOOM_connection c, Z_APDU *a, ODR out)
 804 {
 805     int i;
 806     for (i = 0; i<200; i++)
 807     {
 808         size_t len;
 809         Z_OtherInformation **oi;
 810         char buf[80];
 811         const char *val;
 812         const char *cp;
 813         int oidval;
 814
 815         sprintf (buf, "otherInfo%d", i);
 816         val = ZOOM_options_get (c->options, buf);
 817         if (!val)
 818             break;
 819         cp = strchr (val, ':');
 820         if (!cp)
 821             continue;
 822         len = cp - val;
 823         if (len >= sizeof(buf))
 824             len = sizeof(buf)-1;
 825         memcpy (buf, val, len);
 826         buf[len] = '\0';
 827         oidval = oid_getvalbyname (buf);
 828         if (oidval == VAL_NONE)
 829             continue;
 830
 831         yaz_oi_APDU(a, &oi);
 832         yaz_oi_set_string_oidval(oi, out, oidval, 1, cp+1);
 833     }
 834 }
 835
 836 static int encode_APDU(ZOOM_connection c, Z_APDU *a, ODR out)
 837 {
 838     assert (a);
 839     if (c->cookie_out)
 840     {
 841         Z_OtherInformation **oi;
 842         yaz_oi_APDU(a, &oi);
 843         yaz_oi_set_string_oidval(oi, out, VAL_COOKIE, 1, c->cookie_out);
 844     }
 845     if (c->client_IP)
 846     {
 847         Z_OtherInformation **oi;
 848         yaz_oi_APDU(a, &oi);
 849         yaz_oi_set_string_oidval(oi, out, VAL_CLIENT_IP, 1, c->client_IP);
 850     }
 851     otherInfo_attach (c, a, out);
 852     if (!z_APDU(out, &a, 0, 0))
 853     {
 854         FILE *outf = fopen("/tmp/apdu.txt", "a");
 855         if (a && outf)
 856         {
 857             ODR odr_pr = odr_createmem(ODR_PRINT);
 858             fprintf (outf, "a=%p\n", a);
 859             odr_setprint(odr_pr, outf);
 860             z_APDU(odr_pr, &a, 0, 0);
 861             odr_destroy(odr_pr);
 862         }
 863         yaz_log (LOG_DEBUG, "encoding failed");
 864         set_ZOOM_error(c, ZOOM_ERROR_ENCODE, 0);
 865         odr_reset(out);
 866         return -1;
 867     }
 868
 869     return 0;
 870 }
 871
 872 static zoom_ret send_APDU (ZOOM_connection c, Z_APDU *a)
 873 {
 874     ZOOM_Event event;
 875     assert (a);
 876     if (encode_APDU(c, a, c->odr_out))
 877         return zoom_complete;
 878     yaz_log(LOG_DEBUG, "send APDU type=%d", a->which);
 879     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
 880     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
 881     ZOOM_connection_put_event (c, event);
 882     odr_reset(c->odr_out);
 883     return do_write (c);
 884 }
 885
 886 /* returns 1 if PDU was sent OK (still pending )
 887            0 if PDU was not sent OK (nothing to wait for)
 888 */
 889
 890 static zoom_ret ZOOM_connection_send_init (ZOOM_connection c)
 891 {
 892     const char *impid, *impname, *impver;
 893     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_initRequest);
 894     Z_InitRequest *ireq = apdu->u.initRequest;
 895     Z_IdAuthentication *auth = (Z_IdAuthentication *)
 896         odr_malloc(c->odr_out, sizeof(*auth));
 897     const char *auth_groupId = ZOOM_options_get (c->options, "group");
 898     const char *auth_userId = ZOOM_options_get (c->options, "user");
 899     const char *auth_password = ZOOM_options_get (c->options, "pass");
 900     char *version;
 901
 902     ODR_MASK_SET(ireq->options, Z_Options_search);
 903     ODR_MASK_SET(ireq->options, Z_Options_present);
 904     ODR_MASK_SET(ireq->options, Z_Options_scan);
 905     ODR_MASK_SET(ireq->options, Z_Options_sort);
 906     ODR_MASK_SET(ireq->options, Z_Options_extendedServices);
 907     ODR_MASK_SET(ireq->options, Z_Options_namedResultSets);
 908
 909     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_1);
 910     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_2);
 911     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_3);
 912
 913     /* Index Data's Z39.50 Implementor Id is 81 */
 914     ireq->implementationId = odr_prepend(c->odr_out,
 915         ZOOM_options_get(c->options, "implementationId"),
 916         odr_prepend(c->odr_out, "81", ireq->implementationId));
 917
 918     ireq->implementationName = odr_prepend(c->odr_out,
 919         ZOOM_options_get(c->options, "implementationName"),
 920         odr_prepend(c->odr_out, "ZOOM-C", ireq->implementationName));
 921
 922     version = odr_strdup(c->odr_out, "$Revision: 1.9 $");
 923     if (strlen(version) > 10)   /* check for unexpanded CVS strings */
 924         version[strlen(version)-2] = '\0';
 925     ireq->implementationVersion = odr_prepend(c->odr_out,
 926         ZOOM_options_get(c->options, "implementationVersion"),
 927         odr_prepend(c->odr_out, &version[11], ireq->implementationVersion));
 928
 929     *ireq->maximumRecordSize =
 930         ZOOM_options_get_int (c->options, "maximumRecordSize", 1024*1024);
 931     *ireq->preferredMessageSize =
 932         ZOOM_options_get_int (c->options, "preferredMessageSize", 1024*1024);
 933
 934     if (auth_groupId || auth_password)
 935     {
 936         Z_IdPass *pass = (Z_IdPass *) odr_malloc(c->odr_out, sizeof(*pass));
 937         int i = 0;
 938         pass->groupId = 0;
 939         if (auth_groupId && *auth_groupId)
 940         {
 941             pass->groupId = (char *)
 942                 odr_malloc(c->odr_out, strlen(auth_groupId)+1);
 943             strcpy(pass->groupId, auth_groupId);
 944             i++;
 945         }
 946         pass->userId = 0;
 947         if (auth_userId && *auth_userId)
 948         {
 949             pass->userId = (char *)
 950                 odr_malloc(c->odr_out, strlen(auth_userId)+1);
 951             strcpy(pass->userId, auth_userId);
 952             i++;
 953         }
 954         pass->password = 0;
 955         if (auth_password && *auth_password)
 956         {
 957             pass->password = (char *)
 958                 odr_malloc(c->odr_out, strlen(auth_password)+1);
 959             strcpy(pass->password, auth_password);
 960             i++;
 961         }
 962         if (i)
 963         {
 964             auth->which = Z_IdAuthentication_idPass;
 965             auth->u.idPass = pass;
 966             ireq->idAuthentication = auth;
 967         }
 968     }
 969     else if (auth_userId)
 970     {
 971         auth->which = Z_IdAuthentication_open;
 972         auth->u.open = (char *)
 973             odr_malloc(c->odr_out, strlen(auth_userId)+1);
 974         strcpy(auth->u.open, auth_userId);
 975         ireq->idAuthentication = auth;
 976     }
 977     if (c->proxy)
 978         yaz_oi_set_string_oidval(&ireq->otherInfo, c->odr_out,
 979                                  VAL_PROXY, 1, c->host_port);
 980     if (c->charset||c->lang)
 981     {
 982         Z_OtherInformation **oi;
 983         Z_OtherInformationUnit *oi_unit;
 984
 985         yaz_oi_APDU(apdu, &oi);
 986
 987         if ((oi_unit = yaz_oi_update(oi, c->odr_out, NULL, 0, 0)))
 988         {
 989             ODR_MASK_SET(ireq->options, Z_Options_negotiationModel);
 990
 991             oi_unit->which = Z_OtherInfo_externallyDefinedInfo;
 992             oi_unit->information.externallyDefinedInfo =
 993                 yaz_set_proposal_charneg
 994                 (c->odr_out,
 995                  (const char **)&c->charset, (c->charset) ? 1:0,
 996                  (const char **)&c->lang, (c->lang) ? 1:0, 1);
 997         }
 998     }
 999     assert (apdu);
1000     return send_APDU (c, apdu);
1001 }
1002
1003 #if HAVE_XML2
1004 static zoom_ret send_srw (ZOOM_connection c, Z_SRW_PDU *sr)
1005 {
1006     char ctype[50];
1007     Z_SOAP_Handler h[2] = {
1008         {"http://www.loc.gov/zing/srw/v1.0/", 0, (Z_SOAP_fun) yaz_srw_codec},
1009         {0, 0, 0}
1010     };
1011     ODR o = odr_createmem(ODR_ENCODE);
1012     int ret;
1013     Z_SOAP *p = odr_malloc(o, sizeof(*p));
1014     Z_GDU *gdu;
1015     ZOOM_Event event;
1016
1017     gdu = z_get_HTTP_Request(c->odr_out);
1018     gdu->u.HTTP_Request->path = c->path;
1019
1020     if (c->host_port)
1021     {
1022         const char *cp0 = strstr(c->host_port, "://");
1023         const char *cp1 = 0;
1024         if (cp0)
1025             cp0 = cp0+3;
1026         else
1027             cp0 = c->host_port;
1028
1029         cp1 = strchr(cp0, '/');
1030         if (!cp1)
1031             cp1 = cp0+strlen(cp0);
1032
1033         if (cp0 && cp1)
1034         {
1035             char *h = odr_malloc(c->odr_out, cp1 - cp0 + 1);
1036             memcpy (h, cp0, cp1 - cp0);
1037             h[cp1-cp0] = '\0';
1038             z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
1039                               "Host", h);
1040         }
1041     }
1042
1043     strcpy(ctype, "text/xml");
1044     if (c->charset && strlen(c->charset) < 20)
1045     {
1046         strcat(ctype, "; charset=");
1047         strcat(ctype, c->charset);
1048     }
1049     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
1050                       "Content-Type", ctype);
1051     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
1052                       "SOAPAction", "\"\"");
1053     p->which = Z_SOAP_generic;
1054     p->u.generic = odr_malloc(o, sizeof(*p->u.generic));
1055     p->u.generic->no = 0;
1056     p->u.generic->ns = 0;
1057     p->u.generic->p = sr;
1058     p->ns = "http://schemas.xmlsoap.org/soap/envelope/";
1059
1060     ret = z_soap_codec_enc(o, &p,
1061                            &gdu->u.HTTP_Request->content_buf,
1062                            &gdu->u.HTTP_Request->content_len, h,
1063                            c->charset);
1064
1065     if (!z_GDU(c->odr_out, &gdu, 0, 0))
1066         return zoom_complete;
1067     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
1068
1069     odr_destroy(o);
1070
1071     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
1072     ZOOM_connection_put_event (c, event);
1073     odr_reset(c->odr_out);
1074     return do_write (c);
1075 }
1076 #endif
1077
1078 #if HAVE_XML2
1079 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1080 {
1081     int i;
1082     ZOOM_resultset resultset = 0;
1083     Z_SRW_PDU *sr = 0;
1084     const char *recordPacking = 0;
1085
1086     if (c->error)                  /* don't continue on error */
1087         return zoom_complete;
1088     assert (c->tasks);
1089     if (c->tasks->which == ZOOM_TASK_SEARCH)
1090     {
1091         resultset = c->tasks->u.search.resultset;
1092         resultset->setname = xstrdup ("default");
1093         ZOOM_options_set (resultset->options, "setname", resultset->setname);
1094     }
1095     else if(c->tasks->which == ZOOM_TASK_RETRIEVE)
1096     {
1097         resultset = c->tasks->u.retrieve.resultset;
1098
1099         resultset->start = c->tasks->u.retrieve.start;
1100         resultset->count = c->tasks->u.retrieve.count;
1101
1102         if (resultset->start >= resultset->size)
1103             return zoom_complete;
1104         if (resultset->start + resultset->count > resultset->size)
1105             resultset->count = resultset->size - resultset->start;
1106
1107         for (i = 0; i<resultset->count; i++)
1108         {
1109             ZOOM_record rec =
1110                 record_cache_lookup (resultset, i + resultset->start);
1111             if (!rec)
1112                 break;
1113         }
1114         if (i == resultset->count)
1115             return zoom_complete;
1116     }
1117     assert(resultset->query);
1118
1119     sr = yaz_srw_get(c->odr_out, Z_SRW_searchRetrieve_request);
1120
1121     if (resultset->query->z_query->which == Z_Query_type_104
1122         && resultset->query->z_query->u.type_104->which == Z_External_CQL)
1123     {
1124
1125         sr->u.request->query_type = Z_SRW_query_type_cql;
1126         sr->u.request->query.cql =resultset->query->z_query->u.type_104->u.cql;
1127     }
1128     else if (resultset->query->z_query->which == Z_Query_type_1 &&
1129              resultset->query->z_query->u.type_1)
1130     {
1131         sr->u.request->query_type = Z_SRW_query_type_pqf;
1132         sr->u.request->query.pqf = resultset->query->query_string;
1133     }
1134     else
1135     {
1136         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_QUERY, 0);
1137         return zoom_complete;
1138     }
1139     sr->u.request->startRecord = odr_intdup (c->odr_out, resultset->start + 1);
1140     sr->u.request->maximumRecords = odr_intdup (
1141         c->odr_out, resultset->step>0 ? resultset->step : resultset->count);
1142     sr->u.request->recordSchema = resultset->schema;
1143
1144     recordPacking = ZOOM_resultset_option_get (resultset, "recordPacking");
1145
1146     if (recordPacking)
1147         sr->u.request->recordPacking = odr_strdup(c->odr_out, recordPacking);
1148
1149     return send_srw(c, sr);
1150 }
1151 #else
1152 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1153 {
1154     return zoom_complete;
1155 }
1156 #endif
1157
1158 static zoom_ret ZOOM_connection_send_search (ZOOM_connection c)
1159 {
1160     ZOOM_resultset r;
1161     int lslb, ssub, mspn;
1162     const char *syntax;
1163     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_searchRequest);
1164     Z_SearchRequest *search_req = apdu->u.searchRequest;
1165     const char *elementSetName;
1166     const char *smallSetElementSetName;
1167     const char *mediumSetElementSetName;
1168
1169     assert (c->tasks);
1170     assert (c->tasks->which == ZOOM_TASK_SEARCH);
1171
1172     r = c->tasks->u.search.resultset;
1173
1174     elementSetName =
1175         ZOOM_options_get (r->options, "elementSetName");
1176     smallSetElementSetName  =
1177         ZOOM_options_get (r->options, "smallSetElementSetName");
1178     mediumSetElementSetName =
1179         ZOOM_options_get (r->options, "mediumSetElementSetName");
1180
1181     if (!smallSetElementSetName)
1182         smallSetElementSetName = elementSetName;
1183
1184     if (!mediumSetElementSetName)
1185         mediumSetElementSetName = elementSetName;
1186
1187     assert (r);
1188     assert (r->query);
1189
1190     /* prepare query for the search request */
1191     search_req->query = r->query->z_query;
1192
1193     search_req->databaseNames =
1194         set_DatabaseNames (c, r->options, &search_req->num_databaseNames);
1195
1196     /* get syntax (no need to provide unless piggyback is in effect) */
1197     syntax = ZOOM_options_get (r->options, "preferredRecordSyntax");
1198
1199     lslb = ZOOM_options_get_int (r->options, "largeSetLowerBound", -1);
1200     ssub = ZOOM_options_get_int (r->options, "smallSetUpperBound", -1);
1201     mspn = ZOOM_options_get_int (r->options, "mediumSetPresentNumber", -1);
1202     if (lslb != -1 && ssub != -1 && mspn != -1)
1203     {
1204         /* So're a Z39.50 expert? Let's hope you don't do sort */
1205         *search_req->largeSetLowerBound = lslb;
1206         *search_req->smallSetUpperBound = ssub;
1207         *search_req->mediumSetPresentNumber = mspn;
1208     }
1209     else if (r->start == 0 && r->count > 0
1210              && r->piggyback && !r->r_sort_spec && !r->schema)
1211     {
1212         /* Regular piggyback - do it unless we're going to do sort */
1213         *search_req->largeSetLowerBound = 2000000000;
1214         *search_req->smallSetUpperBound = 1;
1215         *search_req->mediumSetPresentNumber = r->step>0 ? r->step : r->count;
1216     }
1217     else
1218     {
1219         /* non-piggyback. Need not provide elementsets or syntaxes .. */
1220         smallSetElementSetName = 0;
1221         mediumSetElementSetName = 0;
1222         syntax = 0;
1223     }
1224     if (smallSetElementSetName && *smallSetElementSetName)
1225     {
1226         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1227             odr_malloc (c->odr_out, sizeof(*esn));
1228
1229         esn->which = Z_ElementSetNames_generic;
1230         esn->u.generic = odr_strdup (c->odr_out, smallSetElementSetName);
1231         search_req->smallSetElementSetNames = esn;
1232     }
1233     if (mediumSetElementSetName && *mediumSetElementSetName)
1234     {
1235         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1236             odr_malloc (c->odr_out, sizeof(*esn));
1237
1238         esn->which = Z_ElementSetNames_generic;
1239         esn->u.generic = odr_strdup (c->odr_out, mediumSetElementSetName);
1240         search_req->mediumSetElementSetNames = esn;
1241     }
1242     if (syntax)
1243         search_req->preferredRecordSyntax =
1244             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1245
1246     if (!r->setname)
1247     {
1248         if (c->support_named_resultsets)
1249         {
1250             char setname[14];
1251             int ord;
1252             /* find the lowest unused ordinal so that we re-use
1253                result sets on the server. */
1254             for (ord = 1; ; ord++)
1255             {
1256                 ZOOM_resultset rp;
1257                 sprintf (setname, "%d", ord);
1258                 for (rp = c->resultsets; rp; rp = rp->next)
1259                     if (rp->setname && !strcmp (rp->setname, setname))
1260                         break;
1261                 if (!rp)
1262                     break;
1263             }
1264             r->setname = xstrdup (setname);
1265             yaz_log (LOG_DEBUG, "allocating set %s", r->setname);
1266         }
1267         else
1268             r->setname = xstrdup ("default");
1269         ZOOM_options_set (r->options, "setname", r->setname);
1270     }
1271     search_req->resultSetName = odr_strdup(c->odr_out, r->setname);
1272     /* send search request */
1273     return send_APDU (c, apdu);
1274 }
1275
1276 static void response_diag (ZOOM_connection c, Z_DiagRec *p)
1277 {
1278     int oclass;
1279     Z_DefaultDiagFormat *r;
1280     char *addinfo = 0;
1281
1282     xfree (c->addinfo);
1283     c->addinfo = 0;
1284     if (p->which != Z_DiagRec_defaultFormat)
1285     {
1286         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1287         return;
1288     }
1289     r = p->u.defaultFormat;
1290     switch (r->which)
1291     {
1292     case Z_DefaultDiagFormat_v2Addinfo:
1293         addinfo = r->u.v2Addinfo;
1294         break;
1295     case Z_DefaultDiagFormat_v3Addinfo:
1296         addinfo = r->u.v3Addinfo;
1297         break;
1298     }
1299     set_dset_error(c, *r->condition,
1300                    yaz_z3950oid_to_str(r->diagnosticSetId, &oclass),
1301                    addinfo, 0);
1302 }
1303
1304 ZOOM_API(ZOOM_record)
1305 ZOOM_record_clone (ZOOM_record srec)
1306 {
1307     char *buf;
1308     int size;
1309     ODR odr_enc;
1310     ZOOM_record nrec;
1311
1312     odr_enc = odr_createmem(ODR_ENCODE);
1313     if (!z_NamePlusRecord (odr_enc, &srec->npr, 0, 0))
1314         return 0;
1315     buf = odr_getbuf (odr_enc, &size, 0);
1316
1317     nrec = (ZOOM_record) xmalloc (sizeof(*nrec));
1318     nrec->odr = odr_createmem(ODR_DECODE);
1319     nrec->wrbuf_marc = 0;
1320     nrec->wrbuf_iconv = 0;
1321     nrec->wrbuf_opac = 0;
1322     odr_setbuf (nrec->odr, buf, size, 0);
1323     z_NamePlusRecord (nrec->odr, &nrec->npr, 0, 0);
1324
1325     odr_destroy (odr_enc);
1326     return nrec;
1327 }
1328
1329 ZOOM_API(ZOOM_record)
1330 ZOOM_resultset_record_immediate (ZOOM_resultset s,size_t pos)
1331 {
1332     return record_cache_lookup (s, pos);
1333 }
1334
1335 ZOOM_API(ZOOM_record)
1336 ZOOM_resultset_record (ZOOM_resultset r, size_t pos)
1337 {
1338     ZOOM_record rec = ZOOM_resultset_record_immediate(r, pos);
1339
1340     if (!rec)
1341     {
1342         ZOOM_resultset_retrieve (r, 1, pos, 1);
1343         rec = ZOOM_resultset_record_immediate (r, pos);
1344     }
1345     return rec;
1346 }
1347
1348 ZOOM_API(void)
1349 ZOOM_record_destroy (ZOOM_record rec)
1350 {
1351     if (!rec)
1352         return;
1353     if (rec->wrbuf_marc)
1354         wrbuf_free (rec->wrbuf_marc, 1);
1355     if (rec->wrbuf_iconv)
1356         wrbuf_free (rec->wrbuf_iconv, 1);
1357     if (rec->wrbuf_opac)
1358         wrbuf_free (rec->wrbuf_opac, 1);
1359     odr_destroy (rec->odr);
1360     xfree (rec);
1361 }
1362
1363 static const char *record_iconv_return(ZOOM_record rec, int *len,
1364                                        const char *buf, int sz,
1365                                        const char *record_charset)
1366 {
1367     char to[40];
1368     char from[40];
1369     yaz_iconv_t cd = 0;
1370
1371     *from = '\0';
1372     strcpy(to, "UTF-8");
1373     if (record_charset && *record_charset)
1374     {
1375         /* Use "from,to" or just "from" */
1376         const char *cp =strchr(record_charset, ',');
1377         int clen = strlen(record_charset);
1378         if (cp && cp[1])
1379         {
1380             strncpy( to, cp+1, sizeof(to)-1);
1381             to[sizeof(to)-1] = '\0';
1382             clen = cp - record_charset;
1383         }
1384         if (clen > sizeof(from)-1)
1385             clen = sizeof(from)-1;
1386
1387         if (clen)
1388             strncpy(from, record_charset, clen);
1389         from[clen] = '\0';
1390     }
1391
1392     if (*from && *to && (cd = yaz_iconv_open(to, from)))
1393     {
1394         char outbuf[12];
1395         size_t inbytesleft = sz;
1396         const char *inp = buf;
1397
1398         if (!rec->wrbuf_iconv)
1399             rec->wrbuf_iconv = wrbuf_alloc();
1400
1401         wrbuf_rewind(rec->wrbuf_iconv);
1402
1403         while (inbytesleft)
1404         {
1405             size_t outbytesleft = sizeof(outbuf);
1406             char *outp = outbuf;
1407             size_t r = yaz_iconv (cd, (char**) &inp,
1408                                   &inbytesleft,
1409                                   &outp, &outbytesleft);
1410             if (r == (size_t) (-1))
1411             {
1412                 int e = yaz_iconv_error(cd);
1413                 if (e != YAZ_ICONV_E2BIG)
1414                     break;
1415             }
1416             wrbuf_write(rec->wrbuf_iconv, outbuf, outp - outbuf);
1417         }
1418         wrbuf_puts(rec->wrbuf_iconv, "");
1419         buf = wrbuf_buf(rec->wrbuf_iconv);
1420         sz = wrbuf_len(rec->wrbuf_iconv);
1421         yaz_iconv_close(cd);
1422     }
1423     if (len)
1424         *len = sz;
1425     return buf;
1426 }
1427
1428 ZOOM_API(const char *)
1429 ZOOM_record_get (ZOOM_record rec, const char *type_spec, int *len)
1430 {
1431     char type[40];
1432     char charset[40];
1433     const char *cp;
1434     int i;
1435     Z_NamePlusRecord *npr;
1436
1437     if (len)
1438         *len = 0; /* default return */
1439
1440     if (!rec)
1441         return 0;
1442     npr = rec->npr;
1443     if (!npr)
1444         return 0;
1445
1446     cp = type_spec;
1447     for (i = 0; cp[i] && i < sizeof(type)-1; i++)
1448     {
1449         if (cp[i] == ';' || cp[i] == ' ')
1450             break;
1451         type[i] = cp[i];
1452     }
1453     type[i] = '\0';
1454     charset[0] = '\0';
1455     if (type_spec[i] == ';')
1456     {
1457         i++;
1458         while (type_spec[i] == ' ')
1459             i++;
1460         if (!strncmp(type_spec+i, "charset=", 8))
1461         {
1462             cp = type_spec+i+8;
1463             for (i = 0; cp[i] && i < sizeof(charset)-1; i++)
1464             {
1465                 if (cp[i] == ';' || cp[i] == ' ')
1466                     break;
1467                 charset[i] = cp[i];
1468             }
1469             charset[i] = '\0';
1470         }
1471     }
1472
1473     if (!strcmp (type, "database"))
1474     {
1475         if (len)
1476             *len = (npr->databaseName ? strlen(npr->databaseName) : 0);
1477         return npr->databaseName;
1478     }
1479     else if (!strcmp (type, "syntax"))
1480     {
1481         const char *desc = 0;
1482         if (npr->which == Z_NamePlusRecord_databaseRecord)
1483         {
1484             Z_External *r = (Z_External *) npr->u.databaseRecord;
1485             oident *ent = oid_getentbyoid(r->direct_reference);
1486             if (ent)
1487                 desc = ent->desc;
1488         }
1489         if (!desc)
1490             desc = "none";
1491         if (len)
1492             *len = strlen(desc);
1493         return desc;
1494     }
1495     if (npr->which != Z_NamePlusRecord_databaseRecord)
1496         return 0;
1497
1498     /* from now on - we have a database record .. */
1499     if (!strcmp (type, "render"))
1500     {
1501         Z_External *r = (Z_External *) npr->u.databaseRecord;
1502         oident *ent = oid_getentbyoid(r->direct_reference);
1503
1504         /* render bibliographic record .. */
1505         if (r->which == Z_External_OPAC)
1506         {
1507             r = r->u.opac->bibliographicRecord;
1508             if (!r)
1509                 return 0;
1510             ent = oid_getentbyoid(r->direct_reference);
1511         }
1512         if (r->which == Z_External_sutrs)
1513             return record_iconv_return(rec, len,
1514                                        r->u.sutrs->buf, r->u.sutrs->len,
1515                                        charset);
1516         else if (r->which == Z_External_octet)
1517         {
1518             yaz_marc_t mt;
1519             switch (ent->value)
1520             {
1521             case VAL_SOIF:
1522             case VAL_HTML:
1523             case VAL_SUTRS:
1524                 break;
1525             case VAL_TEXT_XML:
1526             case VAL_APPLICATION_XML:
1527                 break;
1528             default:
1529                 if (!rec->wrbuf_marc)
1530                     rec->wrbuf_marc = wrbuf_alloc();
1531
1532                 mt = yaz_marc_create();
1533                 wrbuf_rewind (rec->wrbuf_marc);
1534                 if (yaz_marc_decode_wrbuf (
1535                         mt, (const char *) r->u.octet_aligned->buf,
1536                         r->u.octet_aligned->len,
1537                         rec->wrbuf_marc) > 0)
1538                 {
1539                     yaz_marc_destroy(mt);
1540                     return record_iconv_return(rec, len,
1541                                                wrbuf_buf(rec->wrbuf_marc),
1542                                                wrbuf_len(rec->wrbuf_marc),
1543                                                charset);
1544                 }
1545                 yaz_marc_destroy(mt);
1546             }
1547             return record_iconv_return(rec, len,
1548                                        (const char *) r->u.octet_aligned->buf,
1549                                        r->u.octet_aligned->len,
1550                                        charset);
1551         }
1552         else if (r->which == Z_External_grs1)
1553         {
1554             if (!rec->wrbuf_marc)
1555                 rec->wrbuf_marc = wrbuf_alloc();
1556             wrbuf_rewind (rec->wrbuf_marc);
1557             yaz_display_grs1(rec->wrbuf_marc, r->u.grs1, 0);
1558             return record_iconv_return(rec, len,
1559                                        wrbuf_buf(rec->wrbuf_marc),
1560                                        wrbuf_len(rec->wrbuf_marc),
1561                                        charset);
1562         }
1563         return 0;
1564     }
1565     else if (!strcmp (type, "xml") || !strcmp(type, "oai"))
1566     {
1567         Z_External *r = (Z_External *) npr->u.databaseRecord;
1568         oident *ent = oid_getentbyoid(r->direct_reference);
1569
1570         /* render bibliographic record .. */
1571         if (r->which == Z_External_OPAC)
1572         {
1573             r = r->u.opac->bibliographicRecord;
1574             if (!r)
1575                 return 0;
1576             ent = oid_getentbyoid(r->direct_reference);
1577         }
1578
1579         if (r->which == Z_External_sutrs)
1580             return record_iconv_return(rec, len,
1581                                        (const char *) r->u.sutrs->buf,
1582                                        r->u.sutrs->len,
1583                                        charset);
1584         else if (r->which == Z_External_octet)
1585         {
1586             yaz_marc_t mt;
1587             int marc_decode_type = YAZ_MARC_MARCXML;
1588
1589             if (!strcmp(type, "oai"))
1590                 marc_decode_type = YAZ_MARC_OAIMARC;
1591             switch (ent->value)
1592             {
1593             case VAL_SOIF:
1594             case VAL_HTML:
1595             case VAL_SUTRS:
1596                 break;
1597             case VAL_TEXT_XML:
1598             case VAL_APPLICATION_XML:
1599                 break;
1600             default:
1601                 if (!rec->wrbuf_marc)
1602                     rec->wrbuf_marc = wrbuf_alloc();
1603                 wrbuf_rewind (rec->wrbuf_marc);
1604                 mt = yaz_marc_create();
1605
1606                 yaz_marc_xml(mt, YAZ_MARC_MARCXML);
1607                 if (yaz_marc_decode_wrbuf (
1608                         mt, (const char *) r->u.octet_aligned->buf,
1609                         r->u.octet_aligned->len,
1610                         rec->wrbuf_marc) > 0)
1611                 {
1612                     yaz_marc_destroy(mt);
1613                     return record_iconv_return(rec, len,
1614                                                wrbuf_buf(rec->wrbuf_marc),
1615                                                wrbuf_len(rec->wrbuf_marc),
1616                                                charset);
1617                 }
1618                 yaz_marc_destroy(mt);
1619             }
1620             return record_iconv_return(rec, len,
1621                                        (const char *) r->u.octet_aligned->buf,
1622                                        r->u.octet_aligned->len,
1623                                        charset);
1624         }
1625         else if (r->which == Z_External_grs1)
1626         {
1627             if (len) *len = 5;
1628             return "GRS-1";
1629         }
1630         return 0;
1631     }
1632     else if (!strcmp (type, "raw"))
1633     {
1634         Z_External *r = (Z_External *) npr->u.databaseRecord;
1635
1636         if (r->which == Z_External_sutrs)
1637         {
1638             if (len) *len = r->u.sutrs->len;
1639             return (const char *) r->u.sutrs->buf;
1640         }
1641         else if (r->which == Z_External_octet)
1642         {
1643             if (len) *len = r->u.octet_aligned->len;
1644             return (const char *) r->u.octet_aligned->buf;
1645         }
1646         else /* grs-1, explain, OPAC, ... */
1647         {
1648             if (len) *len = -1;
1649             return (const char *) npr->u.databaseRecord;
1650         }
1651         return 0;
1652     }
1653     else if (!strcmp (type, "ext"))
1654     {
1655         if (len) *len = -1;
1656         return (const char *) npr->u.databaseRecord;
1657     }
1658     else if (!strcmp (type, "opac"))
1659
1660     {
1661         Z_External *r = (Z_External *) npr->u.databaseRecord;
1662         if (r->which == Z_External_OPAC)
1663         {
1664             if (!rec->wrbuf_opac)
1665                 rec->wrbuf_opac = wrbuf_alloc();
1666             wrbuf_rewind (rec->wrbuf_opac);
1667             yaz_display_OPAC(rec->wrbuf_opac, r->u.opac, 0);
1668             return record_iconv_return(rec, len,
1669                                        wrbuf_buf(rec->wrbuf_opac),
1670                                        wrbuf_len(rec->wrbuf_opac),
1671                                        charset);
1672         }
1673     }
1674     return 0;
1675 }
1676
1677 static int strcmp_null(const char *v1, const char *v2)
1678 {
1679     if (!v1 && !v2)
1680         return 0;
1681     if (!v1 || !v2)
1682         return -1;
1683     return strcmp(v1, v2);
1684 }
1685
1686 static void record_cache_add (ZOOM_resultset r, Z_NamePlusRecord *npr,
1687                               int pos)
1688 {
1689     ZOOM_record_cache rc;
1690     const char *elementSetName =
1691         ZOOM_resultset_option_get (r, "elementSetName");
1692     const char *syntax =
1693         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1694
1695     ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_RECV_RECORD);
1696     ZOOM_connection_put_event(r->connection, event);
1697
1698     for (rc = r->record_cache; rc; rc = rc->next)
1699     {
1700         if (pos == rc->pos)
1701         {
1702             if (strcmp_null(r->schema, rc->schema))
1703                 continue;
1704             if (strcmp_null(elementSetName,rc->elementSetName))
1705                 continue;
1706             if (strcmp_null(syntax, rc->syntax))
1707                 continue;
1708             /* not destroying rc->npr (it's handled by nmem )*/
1709             rc->rec.npr = npr;
1710             /* keeping wrbuf_marc too */
1711             return;
1712         }
1713     }
1714     rc = (ZOOM_record_cache) odr_malloc (r->odr, sizeof(*rc));
1715     rc->rec.npr = npr;
1716     rc->rec.odr = 0;
1717     rc->rec.wrbuf_marc = 0;
1718     rc->rec.wrbuf_iconv = 0;
1719     rc->rec.wrbuf_opac = 0;
1720     if (elementSetName)
1721         rc->elementSetName = odr_strdup (r->odr, elementSetName);
1722     else
1723         rc->elementSetName = 0;
1724
1725     if (syntax)
1726         rc->syntax = odr_strdup (r->odr, syntax);
1727     else
1728         rc->syntax = 0;
1729
1730     if (r->schema)
1731         rc->schema = odr_strdup (r->odr, r->schema);
1732     else
1733         rc->schema = 0;
1734
1735     rc->pos = pos;
1736     rc->next = r->record_cache;
1737     r->record_cache = rc;
1738 }
1739
1740 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos)
1741 {
1742     ZOOM_record_cache rc;
1743     const char *elementSetName =
1744         ZOOM_resultset_option_get (r, "elementSetName");
1745     const char *syntax =
1746         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1747
1748     for (rc = r->record_cache; rc; rc = rc->next)
1749     {
1750         if (pos == rc->pos)
1751         {
1752             if (strcmp_null(r->schema, rc->schema))
1753                 continue;
1754             if (strcmp_null(elementSetName,rc->elementSetName))
1755                 continue;
1756             if (strcmp_null(syntax, rc->syntax))
1757                 continue;
1758             return &rc->rec;
1759         }
1760     }
1761     return 0;
1762 }
1763
1764 static void handle_records (ZOOM_connection c, Z_Records *sr,
1765                             int present_phase)
1766 {
1767     ZOOM_resultset resultset;
1768
1769     if (!c->tasks)
1770         return ;
1771     switch (c->tasks->which)
1772     {
1773     case ZOOM_TASK_SEARCH:
1774         resultset = c->tasks->u.search.resultset;
1775         break;
1776     case ZOOM_TASK_RETRIEVE:
1777         resultset = c->tasks->u.retrieve.resultset;
1778         break;
1779     default:
1780         return;
1781     }
1782     if (sr && sr->which == Z_Records_NSD)
1783     {
1784         Z_DiagRec dr, *dr_p = &dr;
1785         dr.which = Z_DiagRec_defaultFormat;
1786         dr.u.defaultFormat = sr->u.nonSurrogateDiagnostic;
1787
1788         response_diag (c, dr_p);
1789     }
1790     else if (sr && sr->which == Z_Records_multipleNSD)
1791     {
1792         if (sr->u.multipleNonSurDiagnostics->num_diagRecs >= 1)
1793             response_diag(c, sr->u.multipleNonSurDiagnostics->diagRecs[0]);
1794         else
1795             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1796     }
1797     else
1798     {
1799         if (resultset->count + resultset->start > resultset->size)
1800             resultset->count = resultset->size - resultset->start;
1801         if (resultset->count < 0)
1802             resultset->count = 0;
1803         if (sr && sr->which == Z_Records_DBOSD)
1804         {
1805             int i;
1806             NMEM nmem = odr_extract_mem (c->odr_in);
1807             Z_NamePlusRecordList *p =
1808                 sr->u.databaseOrSurDiagnostics;
1809             for (i = 0; i<p->num_records; i++)
1810             {
1811                 record_cache_add (resultset, p->records[i],
1812                                   i+ resultset->start);
1813             }
1814             /* transfer our response to search_nmem .. we need it later */
1815             nmem_transfer (resultset->odr->mem, nmem);
1816             nmem_destroy (nmem);
1817             if (present_phase && p->num_records == 0)
1818             {
1819                 /* present response and we didn't get any records! */
1820                 set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1821             }
1822         }
1823         else if (present_phase)
1824         {
1825             /* present response and we didn't get any records! */
1826             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1827         }
1828     }
1829 }
1830
1831 static void handle_present_response (ZOOM_connection c, Z_PresentResponse *pr)
1832 {
1833     handle_records (c, pr->records, 1);
1834 }
1835
1836 static void handle_search_response (ZOOM_connection c, Z_SearchResponse *sr)
1837 {
1838     ZOOM_resultset resultset;
1839     ZOOM_Event event;
1840
1841     yaz_log (LOG_DEBUG, "got search response");
1842
1843     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1844         return ;
1845
1846     event = ZOOM_Event_create(ZOOM_EVENT_RECV_SEARCH);
1847     ZOOM_connection_put_event(c, event);
1848
1849     resultset = c->tasks->u.search.resultset;
1850
1851     resultset->size = *sr->resultCount;
1852     handle_records (c, sr->records, 0);
1853 }
1854
1855 static void sort_response (ZOOM_connection c, Z_SortResponse *res)
1856 {
1857     if (res->diagnostics && res->num_diagnostics > 0)
1858         response_diag (c, res->diagnostics[0]);
1859 }
1860
1861 static int scan_response (ZOOM_connection c, Z_ScanResponse *res)
1862 {
1863     NMEM nmem = odr_extract_mem (c->odr_in);
1864     ZOOM_scanset scan;
1865
1866     if (!c->tasks || c->tasks->which != ZOOM_TASK_SCAN)
1867         return 0;
1868     scan = c->tasks->u.scan.scan;
1869
1870     if (res->entries && res->entries->nonsurrogateDiagnostics)
1871         response_diag(c, res->entries->nonsurrogateDiagnostics[0]);
1872     scan->scan_response = res;
1873     nmem_transfer (scan->odr->mem, nmem);
1874     if (res->stepSize)
1875         ZOOM_options_set_int (scan->options, "stepSize", *res->stepSize);
1876     if (res->positionOfTerm)
1877         ZOOM_options_set_int (scan->options, "position", *res->positionOfTerm);
1878     if (res->scanStatus)
1879         ZOOM_options_set_int (scan->options, "scanStatus", *res->scanStatus);
1880     if (res->numberOfEntriesReturned)
1881         ZOOM_options_set_int (scan->options, "number",
1882                               *res->numberOfEntriesReturned);
1883     nmem_destroy (nmem);
1884     return 1;
1885 }
1886
1887 static zoom_ret send_sort (ZOOM_connection c)
1888 {
1889     ZOOM_resultset  resultset;
1890
1891     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1892         return zoom_complete;
1893
1894     resultset = c->tasks->u.search.resultset;
1895
1896     if (c->error)
1897     {
1898         resultset->r_sort_spec = 0;
1899         return zoom_complete;
1900     }
1901     if (resultset->r_sort_spec)
1902     {
1903         Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_sortRequest);
1904         Z_SortRequest *req = apdu->u.sortRequest;
1905
1906         req->num_inputResultSetNames = 1;
1907         req->inputResultSetNames = (Z_InternationalString **)
1908             odr_malloc (c->odr_out, sizeof(*req->inputResultSetNames));
1909         req->inputResultSetNames[0] =
1910             odr_strdup (c->odr_out, resultset->setname);
1911         req->sortedResultSetName = odr_strdup (c->odr_out, resultset->setname);
1912         req->sortSequence = resultset->r_sort_spec;
1913         resultset->r_sort_spec = 0;
1914         return send_APDU (c, apdu);
1915     }
1916     return zoom_complete;
1917 }
1918
1919 static zoom_ret send_present (ZOOM_connection c)
1920 {
1921     Z_APDU *apdu = 0;
1922     Z_PresentRequest *req = 0;
1923     int i = 0;
1924     const char *syntax = 0;
1925     const char *elementSetName = 0;
1926     ZOOM_resultset  resultset;
1927
1928     if (!c->tasks)
1929         return zoom_complete;
1930
1931     switch (c->tasks->which)
1932     {
1933     case ZOOM_TASK_SEARCH:
1934         resultset = c->tasks->u.search.resultset;
1935         break;
1936     case ZOOM_TASK_RETRIEVE:
1937         resultset = c->tasks->u.retrieve.resultset;
1938         resultset->start = c->tasks->u.retrieve.start;
1939         resultset->count = c->tasks->u.retrieve.count;
1940
1941         if (resultset->start >= resultset->size)
1942             return zoom_complete;
1943         if (resultset->start + resultset->count > resultset->size)
1944             resultset->count = resultset->size - resultset->start;
1945         break;
1946     default:
1947         return zoom_complete;
1948     }
1949
1950     syntax = ZOOM_resultset_option_get (resultset, "preferredRecordSyntax");
1951     elementSetName = ZOOM_resultset_option_get (resultset, "elementSetName");
1952
1953     if (c->error)                  /* don't continue on error */
1954         return zoom_complete;
1955     if (resultset->start < 0)
1956         return zoom_complete;
1957     for (i = 0; i<resultset->count; i++)
1958     {
1959         ZOOM_record rec =
1960             record_cache_lookup (resultset, i + resultset->start);
1961         if (!rec)
1962             break;
1963     }
1964     if (i == resultset->count)
1965         return zoom_complete;
1966
1967     apdu = zget_APDU(c->odr_out, Z_APDU_presentRequest);
1968     req = apdu->u.presentRequest;
1969
1970     resultset->start += i;
1971     resultset->count -= i;
1972     *req->resultSetStartPoint = resultset->start + 1;
1973     *req->numberOfRecordsRequested = resultset->step>0 ?
1974         resultset->step : resultset->count;
1975     assert (*req->numberOfRecordsRequested > 0);
1976
1977     if (syntax && *syntax)
1978         req->preferredRecordSyntax =
1979             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1980
1981     if (resultset->schema && *resultset->schema)
1982     {
1983         Z_RecordComposition *compo = (Z_RecordComposition *)
1984             odr_malloc (c->odr_out, sizeof(*compo));
1985
1986         req->recordComposition = compo;
1987         compo->which = Z_RecordComp_complex;
1988         compo->u.complex = (Z_CompSpec *)
1989             odr_malloc(c->odr_out, sizeof(*compo->u.complex));
1990         compo->u.complex->selectAlternativeSyntax = (bool_t *)
1991             odr_malloc(c->odr_out, sizeof(bool_t));
1992         *compo->u.complex->selectAlternativeSyntax = 0;
1993
1994         compo->u.complex->generic = (Z_Specification *)
1995             odr_malloc(c->odr_out, sizeof(*compo->u.complex->generic));
1996
1997         compo->u.complex->generic->which = Z_Schema_oid;
1998         compo->u.complex->generic->schema.oid = (Odr_oid *)
1999             yaz_str_to_z3950oid (c->odr_out, CLASS_SCHEMA, resultset->schema);
2000
2001         if (!compo->u.complex->generic->schema.oid)
2002         {
2003             /* OID wasn't a schema! Try record syntax instead. */
2004
2005             compo->u.complex->generic->schema.oid = (Odr_oid *)
2006                 yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, resultset->schema);
2007         }
2008         if (elementSetName && *elementSetName)
2009         {
2010             compo->u.complex->generic->elementSpec = (Z_ElementSpec *)
2011                 odr_malloc(c->odr_out, sizeof(Z_ElementSpec));
2012             compo->u.complex->generic->elementSpec->which =
2013                 Z_ElementSpec_elementSetName;
2014             compo->u.complex->generic->elementSpec->u.elementSetName =
2015                 odr_strdup (c->odr_out, elementSetName);
2016         }
2017         else
2018             compo->u.complex->generic->elementSpec = 0;
2019         compo->u.complex->num_dbSpecific = 0;
2020         compo->u.complex->dbSpecific = 0;
2021         compo->u.complex->num_recordSyntax = 0;
2022         compo->u.complex->recordSyntax = 0;
2023     }
2024     else if (elementSetName && *elementSetName)
2025     {
2026         Z_ElementSetNames *esn = (Z_ElementSetNames *)
2027             odr_malloc (c->odr_out, sizeof(*esn));
2028         Z_RecordComposition *compo = (Z_RecordComposition *)
2029             odr_malloc (c->odr_out, sizeof(*compo));
2030
2031         esn->which = Z_ElementSetNames_generic;
2032         esn->u.generic = odr_strdup (c->odr_out, elementSetName);
2033         compo->which = Z_RecordComp_simple;
2034         compo->u.simple = esn;
2035         req->recordComposition = compo;
2036     }
2037     req->resultSetId = odr_strdup(c->odr_out, resultset->setname);
2038     return send_APDU (c, apdu);
2039 }
2040
2041 ZOOM_API(ZOOM_scanset)
2042 ZOOM_connection_scan (ZOOM_connection c, const char *start)
2043 {
2044     ZOOM_scanset scan = (ZOOM_scanset) xmalloc (sizeof(*scan));
2045
2046     scan->connection = c;
2047     scan->odr = odr_createmem (ODR_DECODE);
2048     scan->options = ZOOM_options_create_with_parent (c->options);
2049     scan->refcount = 1;
2050     scan->scan_response = 0;
2051
2052     if ((scan->termListAndStartPoint =
2053          p_query_scan(scan->odr, PROTO_Z3950, &scan->attributeSet,
2054                       start)))
2055     {
2056         ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_SCAN);
2057         task->u.scan.scan = scan;
2058
2059         (scan->refcount)++;
2060         if (!c->async)
2061         {
2062             while (ZOOM_event (1, &c))
2063                 ;
2064         }
2065     }
2066     return scan;
2067 }
2068
2069 ZOOM_API(void)
2070 ZOOM_scanset_destroy (ZOOM_scanset scan)
2071 {
2072     if (!scan)
2073         return;
2074     (scan->refcount)--;
2075     if (scan->refcount == 0)
2076     {
2077         odr_destroy (scan->odr);
2078
2079         ZOOM_options_destroy (scan->options);
2080         xfree (scan);
2081     }
2082 }
2083
2084 static zoom_ret send_package (ZOOM_connection c)
2085 {
2086     ZOOM_Event event;
2087     if (!c->tasks)
2088         return zoom_complete;
2089     assert (c->tasks->which == ZOOM_TASK_PACKAGE);
2090
2091     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
2092     ZOOM_connection_put_event (c, event);
2093
2094     return do_write_ex (c, c->tasks->u.package->buf_out,
2095                         c->tasks->u.package->len_out);
2096 }
2097
2098 static zoom_ret send_scan (ZOOM_connection c)
2099 {
2100     ZOOM_scanset scan;
2101     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_scanRequest);
2102     Z_ScanRequest *req = apdu->u.scanRequest;
2103     if (!c->tasks)
2104         return zoom_complete;
2105     assert (c->tasks->which == ZOOM_TASK_SCAN);
2106     scan = c->tasks->u.scan.scan;
2107
2108     req->termListAndStartPoint = scan->termListAndStartPoint;
2109     req->attributeSet = scan->attributeSet;
2110
2111     *req->numberOfTermsRequested =
2112         ZOOM_options_get_int(scan->options, "number", 10);
2113
2114     req->preferredPositionInResponse =
2115         odr_intdup (c->odr_out,
2116                     ZOOM_options_get_int(scan->options, "position", 1));
2117
2118     req->stepSize =
2119         odr_intdup (c->odr_out,
2120                     ZOOM_options_get_int(scan->options, "stepSize", 0));
2121
2122     req->databaseNames = set_DatabaseNames (c, scan->options,
2123                                             &req->num_databaseNames);
2124
2125     return send_APDU (c, apdu);
2126 }
2127
2128 ZOOM_API(size_t)
2129 ZOOM_scanset_size (ZOOM_scanset scan)
2130 {
2131     if (!scan || !scan->scan_response || !scan->scan_response->entries)
2132         return 0;
2133     return scan->scan_response->entries->num_entries;
2134 }
2135
2136 ZOOM_API(const char *)
2137 ZOOM_scanset_term (ZOOM_scanset scan, size_t pos,
2138                    int *occ, int *len)
2139 {
2140     const char *term = 0;
2141     size_t noent = ZOOM_scanset_size (scan);
2142     Z_ScanResponse *res = scan->scan_response;
2143
2144     *len = 0;
2145     *occ = 0;
2146     if (pos >= noent)
2147         return 0;
2148     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
2149     {
2150         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
2151
2152         if (t->term->which == Z_Term_general)
2153         {
2154             term = (const char *) t->term->u.general->buf;
2155             *len = t->term->u.general->len;
2156         }
2157         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
2158     }
2159     return term;
2160 }
2161
2162 ZOOM_API(const char *)
2163 ZOOM_scanset_display_term (ZOOM_scanset scan, size_t pos,
2164                            int *occ, int *len)
2165 {
2166     const char *term = 0;
2167     size_t noent = ZOOM_scanset_size (scan);
2168     Z_ScanResponse *res = scan->scan_response;
2169
2170     *len = 0;
2171     *occ = 0;
2172     if (pos >= noent)
2173         return 0;
2174     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
2175     {
2176         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
2177
2178         if (t->displayTerm)
2179         {
2180             term = (const char *) t->term->u.general->buf;
2181             *len = strlen(term);
2182         }
2183         else if (t->term->which == Z_Term_general)
2184         {
2185             term = (const char *) t->term->u.general->buf;
2186             *len = t->term->u.general->len;
2187         }
2188         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
2189     }
2190     return term;
2191 }
2192
2193 ZOOM_API(const char *)
2194 ZOOM_scanset_option_get (ZOOM_scanset scan, const char *key)
2195 {
2196     return ZOOM_options_get (scan->options, key);
2197 }
2198
2199 ZOOM_API(void)
2200 ZOOM_scanset_option_set (ZOOM_scanset scan, const char *key,
2201                               const char *val)
2202 {
2203     ZOOM_options_set (scan->options, key, val);
2204 }
2205
2206 static Z_APDU *create_es_package (ZOOM_package p, int type)
2207 {
2208     const char *str;
2209     Z_APDU *apdu = zget_APDU(p->odr_out, Z_APDU_extendedServicesRequest);
2210     Z_ExtendedServicesRequest *req = apdu->u.extendedServicesRequest;
2211
2212     *req->function = Z_ExtendedServicesRequest_create;
2213
2214     str = ZOOM_options_get(p->options, "package-name");
2215     if (str && *str)
2216         req->packageName = nmem_strdup (p->odr_out->mem, str);
2217
2218     str = ZOOM_options_get(p->options, "user-id");
2219     if (str)
2220         req->userId = nmem_strdup (p->odr_out->mem, str);
2221
2222     req->packageType = yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2223                                               type);
2224
2225     str = ZOOM_options_get(p->options, "function");
2226     if (str)
2227     {
2228         if (!strcmp (str, "create"))
2229             *req->function = 1;
2230         if (!strcmp (str, "delete"))
2231             *req->function = 2;
2232         if (!strcmp (str, "modify"))
2233             *req->function = 3;
2234     }
2235     return apdu;
2236 }
2237
2238 static const char *ill_array_lookup (void *clientData, const char *idx)
2239 {
2240     ZOOM_package p = (ZOOM_package) clientData;
2241     return ZOOM_options_get (p->options, idx+4);
2242 }
2243
2244 static Z_External *encode_ill_request (ZOOM_package p)
2245 {
2246     ODR out = p->odr_out;
2247     ILL_Request *req;
2248     Z_External *r = 0;
2249     struct ill_get_ctl ctl;
2250
2251     ctl.odr = p->odr_out;
2252     ctl.clientData = p;
2253     ctl.f = ill_array_lookup;
2254
2255     req = ill_get_ILLRequest(&ctl, "ill", 0);
2256
2257     if (!ill_Request (out, &req, 0, 0))
2258     {
2259         int ill_request_size;
2260         char *ill_request_buf = odr_getbuf (out, &ill_request_size, 0);
2261         if (ill_request_buf)
2262             odr_setbuf (out, ill_request_buf, ill_request_size, 1);
2263         return 0;
2264     }
2265     else
2266     {
2267         oident oid;
2268         int illRequest_size = 0;
2269         char *illRequest_buf = odr_getbuf (out, &illRequest_size, 0);
2270
2271         oid.proto = PROTO_GENERAL;
2272         oid.oclass = CLASS_GENERAL;
2273         oid.value = VAL_ISO_ILL_1;
2274
2275         r = (Z_External *) odr_malloc (out, sizeof(*r));
2276         r->direct_reference = odr_oiddup(out,oid_getoidbyent(&oid));
2277         r->indirect_reference = 0;
2278         r->descriptor = 0;
2279         r->which = Z_External_single;
2280
2281         r->u.single_ASN1_type = (Odr_oct *)
2282             odr_malloc (out, sizeof(*r->u.single_ASN1_type));
2283         r->u.single_ASN1_type->buf = (unsigned char*)
2284             odr_malloc (out, illRequest_size);
2285         r->u.single_ASN1_type->len = illRequest_size;
2286         r->u.single_ASN1_type->size = illRequest_size;
2287         memcpy (r->u.single_ASN1_type->buf, illRequest_buf, illRequest_size);
2288     }
2289     return r;
2290 }
2291
2292 static Z_ItemOrder *encode_item_order(ZOOM_package p)
2293 {
2294     Z_ItemOrder *req = (Z_ItemOrder *) odr_malloc (p->odr_out, sizeof(*req));
2295     const char *str;
2296
2297     req->which=Z_IOItemOrder_esRequest;
2298     req->u.esRequest = (Z_IORequest *)
2299         odr_malloc(p->odr_out,sizeof(Z_IORequest));
2300
2301     /* to keep part ... */
2302     req->u.esRequest->toKeep = (Z_IOOriginPartToKeep *)
2303         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartToKeep));
2304     req->u.esRequest->toKeep->supplDescription = 0;
2305     req->u.esRequest->toKeep->contact = (Z_IOContact *)
2306         odr_malloc (p->odr_out, sizeof(*req->u.esRequest->toKeep->contact));
2307
2308     str = ZOOM_options_get(p->options, "contact-name");
2309     req->u.esRequest->toKeep->contact->name = str ?
2310         nmem_strdup (p->odr_out->mem, str) : 0;
2311
2312     str = ZOOM_options_get(p->options, "contact-phone");
2313     req->u.esRequest->toKeep->contact->phone = str ?
2314         nmem_strdup (p->odr_out->mem, str) : 0;
2315
2316     str = ZOOM_options_get(p->options, "contact-email");
2317     req->u.esRequest->toKeep->contact->email = str ?
2318         nmem_strdup (p->odr_out->mem, str) : 0;
2319
2320     req->u.esRequest->toKeep->addlBilling = 0;
2321
2322     /* not to keep part ... */
2323     req->u.esRequest->notToKeep = (Z_IOOriginPartNotToKeep *)
2324         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartNotToKeep));
2325
2326     str = ZOOM_options_get(p->options, "itemorder-setname");
2327     if (!str)
2328         str = "default";
2329
2330     if (!*str)
2331         req->u.esRequest->notToKeep->resultSetItem = 0;
2332     else
2333     {
2334         req->u.esRequest->notToKeep->resultSetItem = (Z_IOResultSetItem *)
2335            odr_malloc(p->odr_out, sizeof(Z_IOResultSetItem));
2336
2337         req->u.esRequest->notToKeep->resultSetItem->resultSetId =
2338            nmem_strdup (p->odr_out->mem, str);
2339         req->u.esRequest->notToKeep->resultSetItem->item =
2340             (int *) odr_malloc(p->odr_out, sizeof(int));
2341
2342         str = ZOOM_options_get(p->options, "itemorder-item");
2343         *req->u.esRequest->notToKeep->resultSetItem->item =
2344             (str ? atoi(str) : 1);
2345     }
2346     req->u.esRequest->notToKeep->itemRequest = encode_ill_request(p);
2347
2348     return req;
2349 }
2350
2351 Z_APDU *create_admin_package(ZOOM_package p, int type,
2352                              Z_ESAdminOriginPartToKeep **toKeepP,
2353                              Z_ESAdminOriginPartNotToKeep **notToKeepP)
2354 {
2355     Z_APDU *apdu = create_es_package (p, VAL_ADMINSERVICE);
2356     if (apdu)
2357     {
2358         Z_ESAdminOriginPartToKeep  *toKeep;
2359         Z_ESAdminOriginPartNotToKeep  *notToKeep;
2360         Z_External *r = (Z_External *) odr_malloc (p->odr_out, sizeof(*r));
2361         const char *first_db = "Default";
2362         int num_db;
2363         char **db = set_DatabaseNames(p->connection, p->options, &num_db);
2364         if (num_db > 0)
2365             first_db = db[0];
2366
2367         r->direct_reference =
2368             yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2369                                    VAL_ADMINSERVICE);
2370         r->descriptor = 0;
2371         r->indirect_reference = 0;
2372         r->which = Z_External_ESAdmin;
2373
2374         r->u.adminService = (Z_Admin *)
2375             odr_malloc(p->odr_out, sizeof(*r->u.adminService));
2376         r->u.adminService->which = Z_Admin_esRequest;
2377         r->u.adminService->u.esRequest = (Z_AdminEsRequest *)
2378             odr_malloc(p->odr_out, sizeof(*r->u.adminService->u.esRequest));
2379
2380         toKeep = r->u.adminService->u.esRequest->toKeep =
2381             (Z_ESAdminOriginPartToKeep *)
2382             odr_malloc(p->odr_out, sizeof(*r->u.adminService->u.esRequest->toKeep));
2383         toKeep->which=type;
2384         toKeep->databaseName = odr_strdup(p->odr_out, first_db);
2385         toKeep->u.create=odr_nullval();
2386         apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2387
2388         r->u.adminService->u.esRequest->notToKeep = notToKeep =
2389             (Z_ESAdminOriginPartNotToKeep *)
2390             odr_malloc(p->odr_out,
2391                        sizeof(*r->u.adminService->u.esRequest->notToKeep));
2392         notToKeep->which=Z_ESAdminOriginPartNotToKeep_recordsWillFollow;
2393         notToKeep->u.recordsWillFollow=odr_nullval();
2394         if (toKeepP)
2395             *toKeepP = toKeep;
2396         if (notToKeepP)
2397             *notToKeepP = notToKeep;
2398     }
2399     return apdu;
2400 }
2401
2402 static Z_APDU *create_update_package(ZOOM_package p)
2403 {
2404     Z_APDU *apdu = 0;
2405     const char *first_db = "Default";
2406     int num_db;
2407     char **db = set_DatabaseNames(p->connection, p->options, &num_db);
2408     const char *action = ZOOM_options_get(p->options, "action");
2409     const char *recordId = ZOOM_options_get(p->options, "recordId");
2410     const char *record_buf = ZOOM_options_get(p->options, "record");
2411     const char *syntax_str = ZOOM_options_get(p->options, "syntax");
2412     int syntax_oid = VAL_NONE;
2413     int action_no = -1;
2414
2415     if (syntax_str)
2416         syntax_oid = oid_getvalbyname(syntax_str);
2417     if (!record_buf)
2418     {
2419         record_buf = "void";
2420         syntax_oid = VAL_SUTRS;
2421     }
2422     if (syntax_oid != VAL_NONE)
2423         syntax_oid = VAL_TEXT_XML;
2424
2425     if (num_db > 0)
2426         first_db = db[0];
2427
2428     if (!action)
2429         action = "specialUpdate";
2430
2431     if (!strcmp(action, "recordInsert"))
2432         action_no = Z_IUOriginPartToKeep_recordInsert;
2433     else if (!strcmp(action, "recordReplace"))
2434         action_no = Z_IUOriginPartToKeep_recordReplace;
2435     else if (!strcmp(action, "recordDelete"))
2436         action_no = Z_IUOriginPartToKeep_recordDelete;
2437     else if (!strcmp(action, "elementUpdate"))
2438         action_no = Z_IUOriginPartToKeep_elementUpdate;
2439     else if (!strcmp(action, "specialUpdate"))
2440         action_no = Z_IUOriginPartToKeep_specialUpdate;
2441     else
2442         return 0;
2443
2444     apdu = create_es_package (p, VAL_DBUPDATE);
2445     if (apdu)
2446     {
2447         Z_IUOriginPartToKeep *toKeep;
2448         Z_IUSuppliedRecords *notToKeep;
2449         Z_External *r = (Z_External *)
2450             odr_malloc (p->odr_out, sizeof(*r));
2451
2452         apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2453
2454         r->direct_reference =
2455             yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2456                                    VAL_DBUPDATE);
2457         r->descriptor = 0;
2458         r->which = Z_External_update;
2459         r->indirect_reference = 0;
2460         r->u.update = (Z_IUUpdate *)
2461             odr_malloc(p->odr_out, sizeof(*r->u.update));
2462
2463         r->u.update->which = Z_IUUpdate_esRequest;
2464         r->u.update->u.esRequest = (Z_IUUpdateEsRequest *)
2465             odr_malloc(p->odr_out, sizeof(*r->u.update->u.esRequest));
2466         toKeep = r->u.update->u.esRequest->toKeep =
2467             (Z_IUOriginPartToKeep *)
2468             odr_malloc(p->odr_out, sizeof(*toKeep));
2469
2470         toKeep->databaseName = odr_strdup(p->odr_out, first_db);
2471         toKeep->schema = 0;
2472         toKeep->elementSetName = 0;
2473         toKeep->actionQualifier = 0;
2474         toKeep->action = odr_intdup(p->odr_out, action_no);
2475
2476         notToKeep = r->u.update->u.esRequest->notToKeep =
2477             (Z_IUSuppliedRecords *)
2478             odr_malloc(p->odr_out, sizeof(*notToKeep));
2479         notToKeep->num = 1;
2480         notToKeep->elements = (Z_IUSuppliedRecords_elem **)
2481             odr_malloc(p->odr_out, sizeof(*notToKeep->elements));
2482         notToKeep->elements[0] = (Z_IUSuppliedRecords_elem *)
2483             odr_malloc(p->odr_out, sizeof(**notToKeep->elements));
2484         notToKeep->elements[0]->which = Z_IUSuppliedRecords_elem_opaque;
2485         if (recordId)
2486         {
2487             notToKeep->elements[0]->u.opaque = (Odr_oct *)
2488                 odr_malloc (p->odr_out, sizeof(Odr_oct));
2489             notToKeep->elements[0]->u.opaque->size = strlen(recordId);
2490             notToKeep->elements[0]->u.opaque->len = strlen(recordId);
2491             notToKeep->elements[0]->u.opaque->buf =
2492                 odr_strdup(p->odr_out, recordId);
2493         }
2494         else
2495             notToKeep->elements[0]->u.opaque = 0;
2496         notToKeep->elements[0]->supplementalId = 0;
2497         notToKeep->elements[0]->correlationInfo = 0;
2498         notToKeep->elements[0]->record =
2499             z_ext_record(p->odr_out, syntax_oid,
2500                          record_buf, strlen(record_buf));
2501     }
2502     if (0 && apdu)
2503     {
2504        ODR print = odr_createmem(ODR_PRINT);
2505
2506        z_APDU(print, &apdu, 0, 0);
2507        odr_destroy(print);
2508     }
2509     return apdu;
2510 }
2511
2512 ZOOM_API(void)
2513     ZOOM_package_send (ZOOM_package p, const char *type)
2514 {
2515     Z_APDU *apdu = 0;
2516     ZOOM_connection c;
2517     if (!p)
2518         return;
2519     c = p->connection;
2520     odr_reset (p->odr_out);
2521     xfree (p->buf_out);
2522     p->buf_out = 0;
2523     if (!strcmp(type, "itemorder"))
2524     {
2525         apdu = create_es_package (p, VAL_ITEMORDER);
2526         if (apdu)
2527         {
2528             Z_External *r = (Z_External *) odr_malloc (p->odr_out, sizeof(*r));
2529
2530             r->direct_reference =
2531                 yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2532                                        VAL_ITEMORDER);
2533             r->descriptor = 0;
2534             r->which = Z_External_itemOrder;
2535             r->indirect_reference = 0;
2536             r->u.itemOrder = encode_item_order (p);
2537
2538             apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2539         }
2540     }
2541     if (!strcmp(type, "create"))  /* create database */
2542     {
2543         apdu = create_admin_package(p, Z_ESAdminOriginPartToKeep_create,
2544                                     0, 0);
2545     }
2546     if (!strcmp(type, "drop"))  /* drop database */
2547     {
2548         apdu = create_admin_package(p, Z_ESAdminOriginPartToKeep_drop,
2549                                     0, 0);
2550     }
2551     if (!strcmp(type, "update")) /* update record(s) */
2552     {
2553         apdu = create_update_package(p);
2554     }
2555     if (apdu)
2556     {
2557         if (encode_APDU(p->connection, apdu, p->odr_out) == 0)
2558         {
2559             char *buf;
2560
2561             ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_PACKAGE);
2562             task->u.package = p;
2563             buf = odr_getbuf(p->odr_out, &p->len_out, 0);
2564             p->buf_out = (char *) xmalloc (p->len_out);
2565             memcpy (p->buf_out, buf, p->len_out);
2566
2567             (p->refcount)++;
2568             if (!c->async)
2569             {
2570                 while (ZOOM_event (1, &c))
2571                     ;
2572             }
2573         }
2574     }
2575 }
2576
2577 ZOOM_API(ZOOM_package)
2578     ZOOM_connection_package (ZOOM_connection c, ZOOM_options options)
2579 {
2580     ZOOM_package p = (ZOOM_package) xmalloc (sizeof(*p));
2581
2582     p->connection = c;
2583     p->odr_out = odr_createmem (ODR_ENCODE);
2584     p->options = ZOOM_options_create_with_parent2 (options, c->options);
2585     p->refcount = 1;
2586     p->buf_out = 0;
2587     p->len_out = 0;
2588     return p;
2589 }
2590
2591 ZOOM_API(void)
2592     ZOOM_package_destroy(ZOOM_package p)
2593 {
2594     if (!p)
2595         return;
2596     (p->refcount)--;
2597     if (p->refcount == 0)
2598     {
2599         odr_destroy (p->odr_out);
2600         xfree (p->buf_out);
2601
2602         ZOOM_options_destroy (p->options);
2603         xfree (p);
2604     }
2605 }
2606
2607 ZOOM_API(const char *)
2608 ZOOM_package_option_get (ZOOM_package p, const char *key)
2609 {
2610     return ZOOM_options_get (p->options, key);
2611 }
2612
2613
2614 ZOOM_API(void)
2615 ZOOM_package_option_set (ZOOM_package p, const char *key,
2616                               const char *val)
2617 {
2618     ZOOM_options_set (p->options, key, val);
2619 }
2620
2621 static int ZOOM_connection_exec_task (ZOOM_connection c)
2622 {
2623     ZOOM_task task = c->tasks;
2624     zoom_ret ret = zoom_complete;
2625
2626     if (!task)
2627     {
2628         yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task task=<null>");
2629         return 0;
2630     }
2631     yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task type=%d run=%d",
2632              task->which, task->running);
2633     if (c->error != ZOOM_ERROR_NONE)
2634     {
2635         yaz_log (LOG_DEBUG, "remove tasks because of error = %d", c->error);
2636         ZOOM_connection_remove_tasks (c);
2637         return 0;
2638     }
2639     if (task->running)
2640     {
2641         yaz_log (LOG_DEBUG, "task already running");
2642         return 0;
2643     }
2644     task->running = 1;
2645     ret = zoom_complete;
2646     if (c->cs || task->which == ZOOM_TASK_CONNECT)
2647     {
2648         switch (task->which)
2649         {
2650         case ZOOM_TASK_SEARCH:
2651             if (c->proto == PROTO_HTTP)
2652                 ret = ZOOM_connection_srw_send_search(c);
2653             else
2654                 ret = ZOOM_connection_send_search(c);
2655             break;
2656         case ZOOM_TASK_RETRIEVE:
2657             if (c->proto == PROTO_HTTP)
2658                 ret = ZOOM_connection_srw_send_search(c);
2659             else
2660                 ret = send_present (c);
2661             break;
2662         case ZOOM_TASK_CONNECT:
2663             ret = do_connect(c);
2664             break;
2665         case ZOOM_TASK_SCAN:
2666             ret = send_scan(c);
2667             break;
2668         case ZOOM_TASK_PACKAGE:
2669             ret = send_package(c);
2670             break;
2671         }
2672     }
2673     else
2674     {
2675         yaz_log (LOG_DEBUG, "remove tasks because no connection exist");
2676         ZOOM_connection_remove_tasks (c);
2677     }
2678     if (ret == zoom_complete)
2679     {
2680         yaz_log (LOG_DEBUG, "task removed (complete)");
2681         ZOOM_connection_remove_task (c);
2682         return 0;
2683     }
2684     yaz_log (LOG_DEBUG, "task pending");
2685     return 1;
2686 }
2687
2688 static zoom_ret send_sort_present (ZOOM_connection c)
2689 {
2690     zoom_ret r = send_sort (c);
2691     if (r == zoom_complete)
2692         r = send_present (c);
2693     return r;
2694 }
2695
2696 static int es_response (ZOOM_connection c,
2697                         Z_ExtendedServicesResponse *res)
2698 {
2699     if (!c->tasks || c->tasks->which != ZOOM_TASK_PACKAGE)
2700         return 0;
2701     if (res->diagnostics && res->num_diagnostics > 0)
2702         response_diag(c, res->diagnostics[0]);
2703     if (res->taskPackage &&
2704         res->taskPackage->which == Z_External_extendedService)
2705     {
2706         Z_TaskPackage *taskPackage = res->taskPackage->u.extendedService;
2707         Odr_oct *id = taskPackage->targetReference;
2708
2709         if (id)
2710             ZOOM_options_setl (c->tasks->u.package->options,
2711                                "targetReference", (char*) id->buf, id->len);
2712     }
2713     return 1;
2714 }
2715
2716
2717 static void handle_apdu (ZOOM_connection c, Z_APDU *apdu)
2718 {
2719     Z_InitResponse *initrs;
2720
2721     c->mask = 0;
2722     yaz_log (LOG_DEBUG, "recv APDU type=%d", apdu->which);
2723     switch(apdu->which)
2724     {
2725     case Z_APDU_initResponse:
2726         initrs = apdu->u.initResponse;
2727         ZOOM_connection_option_set(c, "serverImplementationId",
2728                                    initrs->implementationId ?
2729                                    initrs->implementationId : "");
2730         ZOOM_connection_option_set(c, "serverImplementationName",
2731                                    initrs->implementationName ?
2732                                    initrs->implementationName : "");
2733         ZOOM_connection_option_set(c, "serverImplementationVersion",
2734                                    initrs->implementationVersion ?
2735                                    initrs->implementationVersion : "");
2736         /* Set the three old options too, for old applications */
2737         ZOOM_connection_option_set(c, "targetImplementationId",
2738                                    initrs->implementationId ?
2739                                    initrs->implementationId : "");
2740         ZOOM_connection_option_set(c, "targetImplementationName",
2741                                    initrs->implementationName ?
2742                                    initrs->implementationName : "");
2743         ZOOM_connection_option_set(c, "targetImplementationVersion",
2744                                    initrs->implementationVersion ?
2745                                    initrs->implementationVersion : "");
2746         if (!*initrs->result)
2747         {
2748             set_ZOOM_error(c, ZOOM_ERROR_INIT, 0);
2749         }
2750         else
2751         {
2752             char *cookie =
2753                 yaz_oi_get_string_oidval (&apdu->u.initResponse->otherInfo,
2754                                           VAL_COOKIE, 1, 0);
2755             xfree (c->cookie_in);
2756             c->cookie_in = 0;
2757             if (cookie)
2758                 c->cookie_in = xstrdup(cookie);
2759             if (ODR_MASK_GET(initrs->options, Z_Options_namedResultSets) &&
2760                 ODR_MASK_GET(initrs->protocolVersion, Z_ProtocolVersion_3))
2761                 c->support_named_resultsets = 1;
2762             if (c->tasks)
2763             {
2764                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2765                 ZOOM_connection_remove_task (c);
2766             }
2767             ZOOM_connection_exec_task (c);
2768         }
2769         if (ODR_MASK_GET(initrs->options, Z_Options_negotiationModel))
2770         {
2771             NMEM tmpmem = nmem_create();
2772             Z_CharSetandLanguageNegotiation *p =
2773                 yaz_get_charneg_record(initrs->otherInfo);
2774
2775             if (p)
2776             {
2777                 char *charset=NULL, *lang=NULL;
2778                 int sel;
2779
2780                 yaz_get_response_charneg(tmpmem, p, &charset, &lang, &sel);
2781                 yaz_log(LOG_DEBUG, "Target accepted: charset %s, "
2782                         "language %s, select %d",
2783                         charset ? charset : "none", lang ? lang : "none", sel);
2784                 if (charset)
2785                     ZOOM_connection_option_set (c, "negotiation-charset",
2786                                                 charset);
2787                 if (lang)
2788                     ZOOM_connection_option_set (c, "negotiation-lang",
2789                                                 lang);
2790                 nmem_destroy(tmpmem);
2791             }
2792         }
2793         break;
2794     case Z_APDU_searchResponse:
2795         handle_search_response (c, apdu->u.searchResponse);
2796         if (send_sort_present (c) == zoom_complete)
2797             ZOOM_connection_remove_task (c);
2798         break;
2799     case Z_APDU_presentResponse:
2800         handle_present_response (c, apdu->u.presentResponse);
2801         if (send_present (c) == zoom_complete)
2802             ZOOM_connection_remove_task (c);
2803         break;
2804     case Z_APDU_sortResponse:
2805         sort_response (c, apdu->u.sortResponse);
2806         if (send_present (c) == zoom_complete)
2807             ZOOM_connection_remove_task (c);
2808         break;
2809     case Z_APDU_scanResponse:
2810         scan_response (c, apdu->u.scanResponse);
2811         ZOOM_connection_remove_task (c);
2812         break;
2813     case Z_APDU_extendedServicesResponse:
2814         es_response (c, apdu->u.extendedServicesResponse);
2815         ZOOM_connection_remove_task (c);
2816         break;
2817     case Z_APDU_close:
2818         if (c->reconnect_ok)
2819         {
2820             do_close(c);
2821             c->tasks->running = 0;
2822             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2823         }
2824         else
2825         {
2826             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2827             do_close(c);
2828         }
2829         break;
2830     default:
2831         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2832         do_close(c);
2833     }
2834 }
2835
2836 #if HAVE_XML2
2837 static void handle_srw_response(ZOOM_connection c,
2838                                 Z_SRW_searchRetrieveResponse *res)
2839 {
2840     ZOOM_resultset resultset = 0;
2841     int i;
2842     NMEM nmem;
2843     ZOOM_Event event;
2844
2845     if (!c->tasks)
2846         return;
2847
2848     if (c->tasks->which == ZOOM_TASK_SEARCH)
2849         resultset = c->tasks->u.search.resultset;
2850     else if (c->tasks->which == ZOOM_TASK_RETRIEVE)
2851         resultset = c->tasks->u.retrieve.resultset;
2852     else
2853         return ;
2854
2855     event = ZOOM_Event_create(ZOOM_EVENT_RECV_SEARCH);
2856     ZOOM_connection_put_event(c, event);
2857
2858     resultset->size = 0;
2859
2860     yaz_log(LOG_DEBUG, "got SRW response OK");
2861
2862     if (res->numberOfRecords)
2863         resultset->size = *res->numberOfRecords;
2864
2865     for (i = 0; i<res->num_records; i++)
2866     {
2867         int pos;
2868
2869         Z_NamePlusRecord *npr = (Z_NamePlusRecord *)
2870             odr_malloc(c->odr_in, sizeof(Z_NamePlusRecord));
2871
2872         if (res->records[i].recordPosition &&
2873             *res->records[i].recordPosition > 0)
2874             pos = *res->records[i].recordPosition - 1;
2875         else
2876             pos = resultset->start + i;
2877
2878         npr->databaseName = 0;
2879         npr->which = Z_NamePlusRecord_databaseRecord;
2880         npr->u.databaseRecord = (Z_External *)
2881             odr_malloc(c->odr_in, sizeof(Z_External));
2882         npr->u.databaseRecord->descriptor = 0;
2883         npr->u.databaseRecord->direct_reference =
2884             yaz_oidval_to_z3950oid(c->odr_in, CLASS_RECSYN, VAL_TEXT_XML);
2885         npr->u.databaseRecord->which = Z_External_octet;
2886         npr->u.databaseRecord->u.octet_aligned = (Odr_oct *)
2887             odr_malloc(c->odr_in, sizeof(Odr_oct));
2888         npr->u.databaseRecord->u.octet_aligned->buf =
2889             res->records[i].recordData_buf;
2890         npr->u.databaseRecord->u.octet_aligned->len =
2891             npr->u.databaseRecord->u.octet_aligned->size =
2892             res->records[i].recordData_len;
2893         record_cache_add (resultset, npr, pos);
2894     }
2895     if (res->num_diagnostics > 0)
2896     {
2897         set_dset_error(c, *res->diagnostics[0].code, "SRW",
2898                        res->diagnostics[0].details, 0);
2899     }
2900     nmem = odr_extract_mem(c->odr_in);
2901     nmem_transfer(resultset->odr->mem, nmem);
2902     nmem_destroy(nmem);
2903 }
2904 #endif
2905
2906 #if HAVE_XML2
2907 static void handle_http(ZOOM_connection c, Z_HTTP_Response *hres)
2908 {
2909     int ret = -1;
2910     const char *content_type = z_HTTP_header_lookup(hres->headers,
2911                                                     "Content-Type");
2912     const char *connection_head = z_HTTP_header_lookup(hres->headers,
2913                                                        "Connection");
2914     c->mask = 0;
2915     yaz_log (LOG_DEBUG, "handle_http");
2916
2917     if (content_type && !yaz_strcmp_del("text/xml", content_type, "; "))
2918     {
2919         Z_SOAP *soap_package = 0;
2920         ODR o = odr_createmem(ODR_DECODE);
2921         Z_SOAP_Handler soap_handlers[2] = {
2922             {"http://www.loc.gov/zing/srw/v1.0/", 0,
2923              (Z_SOAP_fun) yaz_srw_codec},
2924             {0, 0, 0}
2925         };
2926         ret = z_soap_codec(o, &soap_package,
2927                            &hres->content_buf, &hres->content_len,
2928                            soap_handlers);
2929         if (!ret && soap_package->which == Z_SOAP_generic &&
2930             soap_package->u.generic->no == 0)
2931         {
2932             Z_SRW_PDU *sr = soap_package->u.generic->p;
2933             if (sr->which == Z_SRW_searchRetrieve_response)
2934                 handle_srw_response(c, sr->u.response);
2935             else
2936                 ret = -1;
2937         }
2938         else if (!ret && (soap_package->which == Z_SOAP_fault
2939                           || soap_package->which == Z_SOAP_error))
2940         {
2941             set_HTTP_error(c, hres->code,
2942                            soap_package->u.fault->fault_code,
2943                            soap_package->u.fault->fault_string);
2944         }
2945         else
2946             ret = -1;
2947         odr_destroy(o);
2948     }
2949     if (ret)
2950     {
2951         if (hres->code != 200)
2952             set_HTTP_error(c, hres->code, 0, 0);
2953         else
2954             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2955         do_close (c);
2956     }
2957     ZOOM_connection_remove_task(c);
2958     if (!strcmp(hres->version, "1.0"))
2959     {
2960         /* HTTP 1.0: only if Keep-Alive we stay alive.. */
2961         if (!connection_head || strcmp(connection_head, "Keep-Alive"))
2962             do_close(c);
2963     }
2964     else
2965     {
2966         /* HTTP 1.1: only if no close we stay alive .. */
2967         if (connection_head && !strcmp(connection_head, "close"))
2968             do_close(c);
2969     }
2970 }
2971 #endif
2972
2973 static int do_read (ZOOM_connection c)
2974 {
2975     int r, more;
2976     ZOOM_Event event;
2977
2978     event = ZOOM_Event_create (ZOOM_EVENT_RECV_DATA);
2979     ZOOM_connection_put_event (c, event);
2980
2981     r = cs_get (c->cs, &c->buf_in, &c->len_in);
2982     more = cs_more(c->cs);
2983     yaz_log (LOG_DEBUG, "do_read len=%d more=%d", r, more);
2984     if (r == 1)
2985         return 0;
2986     if (r <= 0)
2987     {
2988         if (c->reconnect_ok)
2989         {
2990             do_close (c);
2991             c->reconnect_ok = 0;
2992             yaz_log (LOG_DEBUG, "reconnect read");
2993             c->tasks->running = 0;
2994             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2995         }
2996         else
2997         {
2998             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2999             do_close (c);
3000         }
3001     }
3002     else
3003     {
3004         Z_GDU *gdu;
3005         ZOOM_Event event;
3006
3007         odr_reset (c->odr_in);
3008         odr_setbuf (c->odr_in, c->buf_in, r, 0);
3009         event = ZOOM_Event_create (ZOOM_EVENT_RECV_APDU);
3010         ZOOM_connection_put_event (c, event);
3011
3012         if (!z_GDU (c->odr_in, &gdu, 0, 0))
3013         {
3014             int x;
3015             int err = odr_geterrorx(c->odr_in, &x);
3016             char msg[60];
3017             const char *element = odr_getelement(c->odr_in);
3018             sprintf (msg, "ODR code %d:%d element=%-20s",
3019                      err, x, element ? element : "<unknown>");
3020             set_ZOOM_error(c, ZOOM_ERROR_DECODE, msg);
3021             do_close (c);
3022         }
3023         else if (gdu->which == Z_GDU_Z3950)
3024             handle_apdu (c, gdu->u.z3950);
3025         else if (gdu->which == Z_GDU_HTTP_Response)
3026         {
3027 #if HAVE_XML2
3028             handle_http (c, gdu->u.HTTP_Response);
3029 #else
3030             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
3031             do_close (c);
3032 #endif
3033         }
3034         c->reconnect_ok = 0;
3035     }
3036     return 1;
3037 }
3038
3039 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out)
3040 {
3041     int r;
3042     ZOOM_Event event;
3043
3044     event = ZOOM_Event_create(ZOOM_EVENT_SEND_DATA);
3045     ZOOM_connection_put_event (c, event);
3046
3047     yaz_log (LOG_DEBUG, "do_write_ex len=%d", len_out);
3048     if ((r=cs_put (c->cs, buf_out, len_out)) < 0)
3049     {
3050         if (c->reconnect_ok)
3051         {
3052             do_close (c);
3053             c->reconnect_ok = 0;
3054             yaz_log (LOG_DEBUG, "reconnect write");
3055             c->tasks->running = 0;
3056             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
3057             return zoom_pending;
3058         }
3059         if (c->state == STATE_CONNECTING)
3060             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
3061         else
3062             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
3063         do_close (c);
3064         return zoom_complete;
3065     }
3066     else if (r == 1)
3067     {
3068         c->mask = ZOOM_SELECT_EXCEPT;
3069         if (c->cs->io_pending & CS_WANT_WRITE)
3070             c->mask += ZOOM_SELECT_WRITE;
3071         if (c->cs->io_pending & CS_WANT_READ)
3072             c->mask += ZOOM_SELECT_READ;
3073         yaz_log (LOG_DEBUG, "do_write_ex 1 mask=%d", c->mask);
3074     }
3075     else
3076     {
3077         c->mask = ZOOM_SELECT_READ|ZOOM_SELECT_EXCEPT;
3078         yaz_log (LOG_DEBUG, "do_write_ex 2 mask=%d", c->mask);
3079     }
3080     return zoom_pending;
3081 }
3082
3083 static zoom_ret do_write(ZOOM_connection c)
3084 {
3085     return do_write_ex (c, c->buf_out, c->len_out);
3086 }
3087
3088
3089 ZOOM_API(const char *)
3090 ZOOM_connection_option_get (ZOOM_connection c, const char *key)
3091 {
3092     return ZOOM_options_get (c->options, key);
3093 }
3094
3095 ZOOM_API(void)
3096 ZOOM_connection_option_set (ZOOM_connection c, const char *key,
3097                                   const char *val)
3098 {
3099     ZOOM_options_set (c->options, key, val);
3100 }
3101
3102 ZOOM_API(const char *)
3103 ZOOM_resultset_option_get (ZOOM_resultset r, const char *key)
3104 {
3105     return ZOOM_options_get (r->options, key);
3106 }
3107
3108 ZOOM_API(void)
3109 ZOOM_resultset_option_set (ZOOM_resultset r, const char *key,
3110                                   const char *val)
3111 {
3112     ZOOM_options_set (r->options, key, val);
3113 }
3114
3115
3116 ZOOM_API(int)
3117 ZOOM_connection_errcode (ZOOM_connection c)
3118 {
3119     return ZOOM_connection_error (c, 0, 0);
3120 }
3121
3122 ZOOM_API(const char *)
3123 ZOOM_connection_errmsg (ZOOM_connection c)
3124 {
3125     const char *msg;
3126     ZOOM_connection_error (c, &msg, 0);
3127     return msg;
3128 }
3129
3130 ZOOM_API(const char *)
3131 ZOOM_connection_addinfo (ZOOM_connection c)
3132 {
3133     const char *addinfo;
3134     ZOOM_connection_error (c, 0, &addinfo);
3135     return addinfo;
3136 }
3137
3138 ZOOM_API(const char *)
3139 ZOOM_diag_str (int error)
3140 {
3141     switch (error)
3142     {
3143     case ZOOM_ERROR_NONE:
3144         return "No error";
3145     case ZOOM_ERROR_CONNECT:
3146         return "Connect failed";
3147     case ZOOM_ERROR_MEMORY:
3148         return "Out of memory";
3149     case ZOOM_ERROR_ENCODE:
3150         return "Encoding failed";
3151     case ZOOM_ERROR_DECODE:
3152         return "Decoding failed";
3153     case ZOOM_ERROR_CONNECTION_LOST:
3154         return "Connection lost";
3155     case ZOOM_ERROR_INIT:
3156         return "Init rejected";
3157     case ZOOM_ERROR_INTERNAL:
3158         return "Internal failure";
3159     case ZOOM_ERROR_TIMEOUT:
3160         return "Timeout";
3161     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
3162         return "Unsupported protocol";
3163     case ZOOM_ERROR_UNSUPPORTED_QUERY:
3164         return "Unsupported query type";
3165     default:
3166         return diagbib1_str (error);
3167     }
3168 }
3169
3170 ZOOM_API(int)
3171 ZOOM_connection_error_x (ZOOM_connection c, const char **cp,
3172                          const char **addinfo, const char **diagset)
3173 {
3174     int error = c->error;
3175     if (cp)
3176     {
3177         if (!c->diagset || !strcmp(c->diagset, "ZOOM"))
3178             *cp = ZOOM_diag_str(error);
3179         else if (!strcmp(c->diagset, "HTTP"))
3180             *cp = z_HTTP_errmsg(c->error);
3181         else if (!strcmp(c->diagset, "Bib-1"))
3182             *cp = ZOOM_diag_str(error);
3183         else if (!strcmp(c->diagset, "SRW"))
3184             *cp = yaz_diag_srw_str(c->error);
3185         else
3186             *cp = "Unknown error and diagnostic set";
3187     }
3188     if (addinfo)
3189         *addinfo = c->addinfo ? c->addinfo : "";
3190     if (diagset)
3191         *diagset = c->diagset ? c->diagset : "";
3192     return c->error;
3193 }
3194
3195 ZOOM_API(int)
3196 ZOOM_connection_error (ZOOM_connection c, const char **cp,
3197                        const char **addinfo)
3198 {
3199     return ZOOM_connection_error_x(c, cp, addinfo, 0);
3200 }
3201
3202 static int ZOOM_connection_do_io(ZOOM_connection c, int mask)
3203 {
3204     ZOOM_Event event = 0;
3205     int r = cs_look(c->cs);
3206     yaz_log (LOG_DEBUG, "ZOOM_connection_do_io c=%p mask=%d cs_look=%d",
3207              c, mask, r);
3208
3209     if (r == CS_NONE)
3210     {
3211         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
3212         set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
3213         do_close (c);
3214         ZOOM_connection_put_event (c, event);
3215     }
3216     else if (r == CS_CONNECT)
3217     {
3218         int ret;
3219         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
3220
3221         ret = cs_rcvconnect (c->cs);
3222         yaz_log (LOG_DEBUG, "cs_rcvconnect returned %d", ret);
3223         if (ret == 1)
3224         {
3225             c->mask = ZOOM_SELECT_EXCEPT;
3226             if (c->cs->io_pending & CS_WANT_WRITE)
3227                 c->mask += ZOOM_SELECT_WRITE;
3228             if (c->cs->io_pending & CS_WANT_READ)
3229                 c->mask += ZOOM_SELECT_READ;
3230             ZOOM_connection_put_event (c, event);
3231         }
3232         else if (ret == 0)
3233         {
3234             ZOOM_connection_put_event (c, event);
3235             if (c->proto == PROTO_Z3950)
3236                 ZOOM_connection_send_init(c);
3237             else
3238             {
3239                 /* no init request for SRW .. */
3240                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
3241                 ZOOM_connection_remove_task (c);
3242                 c->mask = 0;
3243                 ZOOM_connection_exec_task (c);
3244             }
3245             c->state = STATE_ESTABLISHED;
3246         }
3247         else
3248         {
3249             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
3250             do_close (c);
3251             ZOOM_connection_put_event (c, event);
3252         }
3253     }
3254     else
3255     {
3256         if (mask & ZOOM_SELECT_READ)
3257             do_read (c);
3258         if (c->cs && (mask & ZOOM_SELECT_WRITE))
3259             do_write (c);
3260     }
3261     return 1;
3262 }
3263
3264 ZOOM_API(int)
3265 ZOOM_connection_last_event(ZOOM_connection cs)
3266 {
3267     if (!cs)
3268         return ZOOM_EVENT_NONE;
3269     return cs->last_event;
3270 }
3271
3272 ZOOM_API(int)
3273 ZOOM_event (int no, ZOOM_connection *cs)
3274 {
3275     int timeout = 5000;
3276 #if HAVE_SYS_POLL_H
3277     struct pollfd pollfds[1024];
3278     ZOOM_connection poll_cs[1024];
3279 #else
3280     struct timeval tv;
3281     fd_set input, output, except;
3282 #endif
3283     int i, r, nfds;
3284     int max_fd = 0;
3285
3286     for (i = 0; i<no; i++)
3287     {
3288         ZOOM_connection c = cs[i];
3289         ZOOM_Event event;
3290         if (c && (event = ZOOM_connection_get_event(c)))
3291         {
3292             ZOOM_Event_destroy (event);
3293             return i+1;
3294         }
3295     }
3296     for (i = 0; i<no; i++)
3297     {
3298         ZOOM_connection c = cs[i];
3299         ZOOM_Event event;
3300         if (c && ZOOM_connection_exec_task (c))
3301         {
3302             if ((event = ZOOM_connection_get_event(c)))
3303             {
3304                 ZOOM_Event_destroy (event);
3305                 return i+1;
3306             }
3307         }
3308     }
3309 #if HAVE_SYS_POLL_H
3310
3311 #else
3312     FD_ZERO (&input);
3313     FD_ZERO (&output);
3314     FD_ZERO (&except);
3315 #endif
3316     nfds = 0;
3317     for (i = 0; i<no; i++)
3318     {
3319         ZOOM_connection c = cs[i];
3320         int fd, mask;
3321         int this_timeout;
3322
3323         if (!c)
3324             continue;
3325         fd = z3950_connection_socket(c);
3326         mask = z3950_connection_mask(c);
3327
3328         if (fd == -1)
3329             continue;
3330         if (max_fd < fd)
3331             max_fd = fd;
3332
3333         this_timeout = ZOOM_options_get_int (c->options, "timeout", -1);
3334         if (this_timeout != -1 && this_timeout < timeout)
3335             timeout = this_timeout;
3336 #if HAVE_SYS_POLL_H
3337         if (mask)
3338         {
3339             short poll_events = 0;
3340
3341             if (mask & ZOOM_SELECT_READ)
3342                 poll_events += POLLIN;
3343             if (mask & ZOOM_SELECT_WRITE)
3344                 poll_events += POLLOUT;
3345             if (mask & ZOOM_SELECT_EXCEPT)
3346                 poll_events += POLLERR;
3347             pollfds[nfds].fd = fd;
3348             pollfds[nfds].events = poll_events;
3349             pollfds[nfds].revents = 0;
3350             poll_cs[nfds] = c;
3351             nfds++;
3352         }
3353 #else
3354         if (mask & ZOOM_SELECT_READ)
3355         {
3356             FD_SET (fd, &input);
3357             nfds++;
3358         }
3359         if (mask & ZOOM_SELECT_WRITE)
3360         {
3361             FD_SET (fd, &output);
3362             nfds++;
3363         }
3364         if (mask & ZOOM_SELECT_EXCEPT)
3365         {
3366             FD_SET (fd, &except);
3367             nfds++;
3368         }
3369 #endif
3370     }
3371     if (timeout >= 5000)
3372         timeout = 30;
3373
3374     if (!nfds)
3375         return 0;
3376
3377 #if HAVE_SYS_POLL_H
3378     r = poll (pollfds, nfds, timeout * 1000);
3379     for (i = 0; i<nfds; i++)
3380     {
3381         ZOOM_connection c = poll_cs[i];
3382         if (r && c->mask)
3383         {
3384             int mask = 0;
3385             if (pollfds[i].revents & POLLIN)
3386                 mask += ZOOM_SELECT_READ;
3387             if (pollfds[i].revents & POLLOUT)
3388                 mask += ZOOM_SELECT_WRITE;
3389             if (pollfds[i].revents & POLLERR)
3390                 mask += ZOOM_SELECT_EXCEPT;
3391             if (mask)
3392                 ZOOM_connection_do_io(c, mask);
3393         }
3394         else if (r == 0 && c->mask)
3395         {
3396             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
3397             /* timeout and this connection was waiting */
3398             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
3399             do_close (c);
3400             ZOOM_connection_put_event(c, event);
3401         }
3402     }
3403 #else
3404     tv.tv_sec = timeout;
3405     tv.tv_usec = 0;
3406     yaz_log (LOG_DEBUG, "select start");
3407     r = select (max_fd+1, &input, &output, &except, &tv);
3408     yaz_log (LOG_DEBUG, "select stop, returned r=%d", r);
3409     for (i = 0; i<no; i++)
3410     {
3411         ZOOM_connection c = cs[i];
3412         int fd, mask;
3413
3414         if (!c)
3415             continue;
3416         fd = z3950_connection_socket(c);
3417         mask = 0;
3418         if (r && c->mask)
3419         {
3420             /* no timeout and real socket */
3421             if (FD_ISSET(fd, &input))
3422                 mask += ZOOM_SELECT_READ;
3423             if (FD_ISSET(fd, &output))
3424                 mask += ZOOM_SELECT_WRITE;
3425             if (FD_ISSET(fd, &except))
3426                 mask += ZOOM_SELECT_EXCEPT;
3427             if (mask)
3428                 ZOOM_connection_do_io(c, mask);
3429         }
3430         if (r == 0 && c->mask)
3431         {
3432             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
3433             /* timeout and this connection was waiting */
3434             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
3435             do_close (c);
3436             yaz_log (LOG_DEBUG, "timeout");
3437             ZOOM_connection_put_event(c, event);
3438         }
3439     }
3440 #endif
3441     for (i = 0; i<no; i++)
3442     {
3443         ZOOM_connection c = cs[i];
3444         ZOOM_Event event;
3445         if (c && (event = ZOOM_connection_get_event(c)))
3446         {
3447             ZOOM_Event_destroy (event);
3448             return i+1;
3449         }
3450     }
3451     return 0;
3452 }