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 1.16 2004-01-07 20:36:44 adam Exp $
   6  *
   7  * ZOOM layer for C, connections, result sets, queries.
   8  */
   9 #include <assert.h>
  10 #include <string.h>
  11 #include "zoom-p.h"
  12
  13 #include <yaz/yaz-util.h>
  14 #include <yaz/xmalloc.h>
  15 #include <yaz/otherinfo.h>
  16 #include <yaz/log.h>
  17 #include <yaz/pquery.h>
  18 #include <yaz/marcdisp.h>
  19 #include <yaz/diagbib1.h>
  20 #include <yaz/charneg.h>
  21 #include <yaz/ill.h>
  22 #include <yaz/srw.h>
  23
  24 #if HAVE_SYS_POLL_H
  25 #include <sys/poll.h>
  26 #endif
  27
  28 typedef enum {
  29     zoom_pending,
  30     zoom_complete
  31 } zoom_ret;
  32
  33 static zoom_ret ZOOM_connection_send_init (ZOOM_connection c);
  34 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out);
  35
  36 static ZOOM_Event ZOOM_Event_create (int kind)
  37 {
  38     ZOOM_Event event = (ZOOM_Event) xmalloc (sizeof(*event));
  39     event->kind = kind;
  40     event->next = 0;
  41     event->prev = 0;
  42     return event;
  43 }
  44
  45 static void ZOOM_Event_destroy (ZOOM_Event event)
  46 {
  47     xfree (event);
  48 }
  49
  50 static void ZOOM_connection_put_event (ZOOM_connection c, ZOOM_Event event)
  51 {
  52     if (c->m_queue_back)
  53     {
  54         c->m_queue_back->prev = event;
  55         assert (c->m_queue_front);
  56     }
  57     else
  58     {
  59         assert (!c->m_queue_front);
  60         c->m_queue_front = event;
  61     }
  62     event->next = c->m_queue_back;
  63     event->prev = 0;
  64     c->m_queue_back = event;
  65 }
  66
  67 static ZOOM_Event ZOOM_connection_get_event(ZOOM_connection c)
  68 {
  69     ZOOM_Event event = c->m_queue_front;
  70     if (!event)
  71     {
  72         c->last_event = ZOOM_EVENT_NONE;
  73         return 0;
  74     }
  75     assert (c->m_queue_back);
  76     c->m_queue_front = event->prev;
  77     if (c->m_queue_front)
  78     {
  79         assert (c->m_queue_back);
  80         c->m_queue_front->next = 0;
  81     }
  82     else
  83         c->m_queue_back = 0;
  84     c->last_event = event->kind;
  85     return event;
  86 }
  87
  88
  89 static void set_dset_error (ZOOM_connection c, int error,
  90                             const char *dset,
  91                             const char *addinfo, const char *addinfo2)
  92 {
  93     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     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_initRequest);
 893     Z_InitRequest *ireq = apdu->u.initRequest;
 894     Z_IdAuthentication *auth = (Z_IdAuthentication *)
 895         odr_malloc(c->odr_out, sizeof(*auth));
 896     const char *auth_groupId = ZOOM_options_get (c->options, "group");
 897     const char *auth_userId = ZOOM_options_get (c->options, "user");
 898     const char *auth_password = ZOOM_options_get (c->options, "pass");
 899     char *version;
 900
 901     ODR_MASK_SET(ireq->options, Z_Options_search);
 902     ODR_MASK_SET(ireq->options, Z_Options_present);
 903     ODR_MASK_SET(ireq->options, Z_Options_scan);
 904     ODR_MASK_SET(ireq->options, Z_Options_sort);
 905     ODR_MASK_SET(ireq->options, Z_Options_extendedServices);
 906     ODR_MASK_SET(ireq->options, Z_Options_namedResultSets);
 907
 908     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_1);
 909     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_2);
 910     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_3);
 911
 912     /* Index Data's Z39.50 Implementor Id is 81 */
 913     ireq->implementationId = odr_prepend(c->odr_out,
 914         ZOOM_options_get(c->options, "implementationId"),
 915         odr_prepend(c->odr_out, "81", ireq->implementationId));
 916
 917     ireq->implementationName = odr_prepend(c->odr_out,
 918         ZOOM_options_get(c->options, "implementationName"),
 919         odr_prepend(c->odr_out, "ZOOM-C", ireq->implementationName));
 920
 921     version = odr_strdup(c->odr_out, "$Revision: 1.16 $");
 922     if (strlen(version) > 10)   /* check for unexpanded CVS strings */
 923         version[strlen(version)-2] = '\0';
 924     ireq->implementationVersion = odr_prepend(c->odr_out,
 925         ZOOM_options_get(c->options, "implementationVersion"),
 926         odr_prepend(c->odr_out, &version[11], ireq->implementationVersion));
 927
 928     *ireq->maximumRecordSize =
 929         ZOOM_options_get_int (c->options, "maximumRecordSize", 1024*1024);
 930     *ireq->preferredMessageSize =
 931         ZOOM_options_get_int (c->options, "preferredMessageSize", 1024*1024);
 932
 933     if (auth_groupId || auth_password)
 934     {
 935         Z_IdPass *pass = (Z_IdPass *) odr_malloc(c->odr_out, sizeof(*pass));
 936         int i = 0;
 937         pass->groupId = 0;
 938         if (auth_groupId && *auth_groupId)
 939         {
 940             pass->groupId = (char *)
 941                 odr_malloc(c->odr_out, strlen(auth_groupId)+1);
 942             strcpy(pass->groupId, auth_groupId);
 943             i++;
 944         }
 945         pass->userId = 0;
 946         if (auth_userId && *auth_userId)
 947         {
 948             pass->userId = (char *)
 949                 odr_malloc(c->odr_out, strlen(auth_userId)+1);
 950             strcpy(pass->userId, auth_userId);
 951             i++;
 952         }
 953         pass->password = 0;
 954         if (auth_password && *auth_password)
 955         {
 956             pass->password = (char *)
 957                 odr_malloc(c->odr_out, strlen(auth_password)+1);
 958             strcpy(pass->password, auth_password);
 959             i++;
 960         }
 961         if (i)
 962         {
 963             auth->which = Z_IdAuthentication_idPass;
 964             auth->u.idPass = pass;
 965             ireq->idAuthentication = auth;
 966         }
 967     }
 968     else if (auth_userId)
 969     {
 970         auth->which = Z_IdAuthentication_open;
 971         auth->u.open = (char *)
 972             odr_malloc(c->odr_out, strlen(auth_userId)+1);
 973         strcpy(auth->u.open, auth_userId);
 974         ireq->idAuthentication = auth;
 975     }
 976     if (c->proxy)
 977         yaz_oi_set_string_oidval(&ireq->otherInfo, c->odr_out,
 978                                  VAL_PROXY, 1, c->host_port);
 979     if (c->charset||c->lang)
 980     {
 981         Z_OtherInformation **oi;
 982         Z_OtherInformationUnit *oi_unit;
 983
 984         yaz_oi_APDU(apdu, &oi);
 985
 986         if ((oi_unit = yaz_oi_update(oi, c->odr_out, NULL, 0, 0)))
 987         {
 988             ODR_MASK_SET(ireq->options, Z_Options_negotiationModel);
 989
 990             oi_unit->which = Z_OtherInfo_externallyDefinedInfo;
 991             oi_unit->information.externallyDefinedInfo =
 992                 yaz_set_proposal_charneg
 993                 (c->odr_out,
 994                  (const char **)&c->charset, (c->charset) ? 1:0,
 995                  (const char **)&c->lang, (c->lang) ? 1:0, 1);
 996         }
 997     }
 998     assert (apdu);
 999     return send_APDU (c, apdu);
1000 }
1001
1002 #if HAVE_XML2
1003 static zoom_ret send_srw (ZOOM_connection c, Z_SRW_PDU *sr)
1004 {
1005     char ctype[50];
1006     Z_SOAP_Handler h[2] = {
1007         {"http://www.loc.gov/zing/srw/", 0, (Z_SOAP_fun) yaz_srw_codec},
1008         {0, 0, 0}
1009     };
1010     ODR o = odr_createmem(ODR_ENCODE);
1011     int ret;
1012     Z_SOAP *p = odr_malloc(o, sizeof(*p));
1013     Z_GDU *gdu;
1014     ZOOM_Event event;
1015
1016     gdu = z_get_HTTP_Request(c->odr_out);
1017     gdu->u.HTTP_Request->path = c->path;
1018
1019     if (c->host_port)
1020     {
1021         const char *cp0 = strstr(c->host_port, "://");
1022         const char *cp1 = 0;
1023         if (cp0)
1024             cp0 = cp0+3;
1025         else
1026             cp0 = c->host_port;
1027
1028         cp1 = strchr(cp0, '/');
1029         if (!cp1)
1030             cp1 = cp0+strlen(cp0);
1031
1032         if (cp0 && cp1)
1033         {
1034             char *h = odr_malloc(c->odr_out, cp1 - cp0 + 1);
1035             memcpy (h, cp0, cp1 - cp0);
1036             h[cp1-cp0] = '\0';
1037             z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
1038                               "Host", h);
1039         }
1040     }
1041
1042     strcpy(ctype, "text/xml");
1043     if (c->charset && strlen(c->charset) < 20)
1044     {
1045         strcat(ctype, "; charset=");
1046         strcat(ctype, c->charset);
1047     }
1048     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
1049                       "Content-Type", ctype);
1050     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
1051                       "SOAPAction", "\"\"");
1052     p->which = Z_SOAP_generic;
1053     p->u.generic = odr_malloc(o, sizeof(*p->u.generic));
1054     p->u.generic->no = 0;
1055     p->u.generic->ns = 0;
1056     p->u.generic->p = sr;
1057     p->ns = "http://schemas.xmlsoap.org/soap/envelope/";
1058
1059     ret = z_soap_codec_enc(o, &p,
1060                            &gdu->u.HTTP_Request->content_buf,
1061                            &gdu->u.HTTP_Request->content_len, h,
1062                            c->charset, 0);
1063
1064     if (!z_GDU(c->odr_out, &gdu, 0, 0))
1065         return zoom_complete;
1066     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
1067
1068     odr_destroy(o);
1069
1070     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
1071     ZOOM_connection_put_event (c, event);
1072     odr_reset(c->odr_out);
1073     return do_write (c);
1074 }
1075 #endif
1076
1077 #if HAVE_XML2
1078 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1079 {
1080     int i;
1081     ZOOM_resultset resultset = 0;
1082     Z_SRW_PDU *sr = 0;
1083     const char *recordPacking = 0;
1084
1085     if (c->error)                  /* don't continue on error */
1086         return zoom_complete;
1087     assert (c->tasks);
1088     if (c->tasks->which == ZOOM_TASK_SEARCH)
1089     {
1090         resultset = c->tasks->u.search.resultset;
1091         resultset->setname = xstrdup ("default");
1092         ZOOM_options_set (resultset->options, "setname", resultset->setname);
1093     }
1094     else if(c->tasks->which == ZOOM_TASK_RETRIEVE)
1095     {
1096         resultset = c->tasks->u.retrieve.resultset;
1097
1098         resultset->start = c->tasks->u.retrieve.start;
1099         resultset->count = c->tasks->u.retrieve.count;
1100
1101         if (resultset->start >= resultset->size)
1102             return zoom_complete;
1103         if (resultset->start + resultset->count > resultset->size)
1104             resultset->count = resultset->size - resultset->start;
1105
1106         for (i = 0; i<resultset->count; i++)
1107         {
1108             ZOOM_record rec =
1109                 record_cache_lookup (resultset, i + resultset->start);
1110             if (!rec)
1111                 break;
1112         }
1113         if (i == resultset->count)
1114             return zoom_complete;
1115     }
1116     assert(resultset->query);
1117
1118     sr = yaz_srw_get(c->odr_out, Z_SRW_searchRetrieve_request);
1119
1120     if (resultset->query->z_query->which == Z_Query_type_104
1121         && resultset->query->z_query->u.type_104->which == Z_External_CQL)
1122     {
1123
1124         sr->u.request->query_type = Z_SRW_query_type_cql;
1125         sr->u.request->query.cql =resultset->query->z_query->u.type_104->u.cql;
1126     }
1127     else if (resultset->query->z_query->which == Z_Query_type_1 &&
1128              resultset->query->z_query->u.type_1)
1129     {
1130         sr->u.request->query_type = Z_SRW_query_type_pqf;
1131         sr->u.request->query.pqf = resultset->query->query_string;
1132     }
1133     else
1134     {
1135         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_QUERY, 0);
1136         return zoom_complete;
1137     }
1138     sr->u.request->startRecord = odr_intdup (c->odr_out, resultset->start + 1);
1139     sr->u.request->maximumRecords = odr_intdup (
1140         c->odr_out, resultset->step>0 ? resultset->step : resultset->count);
1141     sr->u.request->recordSchema = resultset->schema;
1142
1143     recordPacking = ZOOM_resultset_option_get (resultset, "recordPacking");
1144
1145     if (recordPacking)
1146         sr->u.request->recordPacking = odr_strdup(c->odr_out, recordPacking);
1147
1148     return send_srw(c, sr);
1149 }
1150 #else
1151 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1152 {
1153     return zoom_complete;
1154 }
1155 #endif
1156
1157 static zoom_ret ZOOM_connection_send_search (ZOOM_connection c)
1158 {
1159     ZOOM_resultset r;
1160     int lslb, ssub, mspn;
1161     const char *syntax;
1162     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_searchRequest);
1163     Z_SearchRequest *search_req = apdu->u.searchRequest;
1164     const char *elementSetName;
1165     const char *smallSetElementSetName;
1166     const char *mediumSetElementSetName;
1167
1168     assert (c->tasks);
1169     assert (c->tasks->which == ZOOM_TASK_SEARCH);
1170
1171     r = c->tasks->u.search.resultset;
1172
1173     elementSetName =
1174         ZOOM_options_get (r->options, "elementSetName");
1175     smallSetElementSetName  =
1176         ZOOM_options_get (r->options, "smallSetElementSetName");
1177     mediumSetElementSetName =
1178         ZOOM_options_get (r->options, "mediumSetElementSetName");
1179
1180     if (!smallSetElementSetName)
1181         smallSetElementSetName = elementSetName;
1182
1183     if (!mediumSetElementSetName)
1184         mediumSetElementSetName = elementSetName;
1185
1186     assert (r);
1187     assert (r->query);
1188
1189     /* prepare query for the search request */
1190     search_req->query = r->query->z_query;
1191
1192     search_req->databaseNames =
1193         set_DatabaseNames (c, r->options, &search_req->num_databaseNames);
1194
1195     /* get syntax (no need to provide unless piggyback is in effect) */
1196     syntax = ZOOM_options_get (r->options, "preferredRecordSyntax");
1197
1198     lslb = ZOOM_options_get_int (r->options, "largeSetLowerBound", -1);
1199     ssub = ZOOM_options_get_int (r->options, "smallSetUpperBound", -1);
1200     mspn = ZOOM_options_get_int (r->options, "mediumSetPresentNumber", -1);
1201     if (lslb != -1 && ssub != -1 && mspn != -1)
1202     {
1203         /* So're a Z39.50 expert? Let's hope you don't do sort */
1204         *search_req->largeSetLowerBound = lslb;
1205         *search_req->smallSetUpperBound = ssub;
1206         *search_req->mediumSetPresentNumber = mspn;
1207     }
1208     else if (r->start == 0 && r->count > 0
1209              && r->piggyback && !r->r_sort_spec && !r->schema)
1210     {
1211         /* Regular piggyback - do it unless we're going to do sort */
1212         *search_req->largeSetLowerBound = 2000000000;
1213         *search_req->smallSetUpperBound = 1;
1214         *search_req->mediumSetPresentNumber = r->step>0 ? r->step : r->count;
1215     }
1216     else
1217     {
1218         /* non-piggyback. Need not provide elementsets or syntaxes .. */
1219         smallSetElementSetName = 0;
1220         mediumSetElementSetName = 0;
1221         syntax = 0;
1222     }
1223     if (smallSetElementSetName && *smallSetElementSetName)
1224     {
1225         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1226             odr_malloc (c->odr_out, sizeof(*esn));
1227
1228         esn->which = Z_ElementSetNames_generic;
1229         esn->u.generic = odr_strdup (c->odr_out, smallSetElementSetName);
1230         search_req->smallSetElementSetNames = esn;
1231     }
1232     if (mediumSetElementSetName && *mediumSetElementSetName)
1233     {
1234         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1235             odr_malloc (c->odr_out, sizeof(*esn));
1236
1237         esn->which = Z_ElementSetNames_generic;
1238         esn->u.generic = odr_strdup (c->odr_out, mediumSetElementSetName);
1239         search_req->mediumSetElementSetNames = esn;
1240     }
1241     if (syntax)
1242         search_req->preferredRecordSyntax =
1243             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1244
1245     if (!r->setname)
1246     {
1247         if (c->support_named_resultsets)
1248         {
1249             char setname[14];
1250             int ord;
1251             /* find the lowest unused ordinal so that we re-use
1252                result sets on the server. */
1253             for (ord = 1; ; ord++)
1254             {
1255                 ZOOM_resultset rp;
1256                 sprintf (setname, "%d", ord);
1257                 for (rp = c->resultsets; rp; rp = rp->next)
1258                     if (rp->setname && !strcmp (rp->setname, setname))
1259                         break;
1260                 if (!rp)
1261                     break;
1262             }
1263             r->setname = xstrdup (setname);
1264             yaz_log (LOG_DEBUG, "allocating set %s", r->setname);
1265         }
1266         else
1267             r->setname = xstrdup ("default");
1268         ZOOM_options_set (r->options, "setname", r->setname);
1269     }
1270     search_req->resultSetName = odr_strdup(c->odr_out, r->setname);
1271     /* send search request */
1272     return send_APDU (c, apdu);
1273 }
1274
1275 static void response_diag (ZOOM_connection c, Z_DiagRec *p)
1276 {
1277     int oclass;
1278     Z_DefaultDiagFormat *r;
1279     char *addinfo = 0;
1280
1281     xfree (c->addinfo);
1282     c->addinfo = 0;
1283     if (p->which != Z_DiagRec_defaultFormat)
1284     {
1285         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1286         return;
1287     }
1288     r = p->u.defaultFormat;
1289     switch (r->which)
1290     {
1291     case Z_DefaultDiagFormat_v2Addinfo:
1292         addinfo = r->u.v2Addinfo;
1293         break;
1294     case Z_DefaultDiagFormat_v3Addinfo:
1295         addinfo = r->u.v3Addinfo;
1296         break;
1297     }
1298     set_dset_error(c, *r->condition,
1299                    yaz_z3950oid_to_str(r->diagnosticSetId, &oclass),
1300                    addinfo, 0);
1301 }
1302
1303 ZOOM_API(ZOOM_record)
1304 ZOOM_record_clone (ZOOM_record srec)
1305 {
1306     char *buf;
1307     int size;
1308     ODR odr_enc;
1309     ZOOM_record nrec;
1310
1311     odr_enc = odr_createmem(ODR_ENCODE);
1312     if (!z_NamePlusRecord (odr_enc, &srec->npr, 0, 0))
1313         return 0;
1314     buf = odr_getbuf (odr_enc, &size, 0);
1315
1316     nrec = (ZOOM_record) xmalloc (sizeof(*nrec));
1317     nrec->odr = odr_createmem(ODR_DECODE);
1318     nrec->wrbuf_marc = 0;
1319     nrec->wrbuf_iconv = 0;
1320     nrec->wrbuf_opac = 0;
1321     odr_setbuf (nrec->odr, buf, size, 0);
1322     z_NamePlusRecord (nrec->odr, &nrec->npr, 0, 0);
1323
1324     odr_destroy (odr_enc);
1325     return nrec;
1326 }
1327
1328 ZOOM_API(ZOOM_record)
1329 ZOOM_resultset_record_immediate (ZOOM_resultset s,size_t pos)
1330 {
1331     return record_cache_lookup (s, pos);
1332 }
1333
1334 ZOOM_API(ZOOM_record)
1335 ZOOM_resultset_record (ZOOM_resultset r, size_t pos)
1336 {
1337     ZOOM_record rec = ZOOM_resultset_record_immediate(r, pos);
1338
1339     if (!rec)
1340     {
1341         ZOOM_resultset_retrieve (r, 1, pos, 1);
1342         rec = ZOOM_resultset_record_immediate (r, pos);
1343     }
1344     return rec;
1345 }
1346
1347 ZOOM_API(void)
1348 ZOOM_record_destroy (ZOOM_record rec)
1349 {
1350     if (!rec)
1351         return;
1352     if (rec->wrbuf_marc)
1353         wrbuf_free (rec->wrbuf_marc, 1);
1354     if (rec->wrbuf_iconv)
1355         wrbuf_free (rec->wrbuf_iconv, 1);
1356     if (rec->wrbuf_opac)
1357         wrbuf_free (rec->wrbuf_opac, 1);
1358     odr_destroy (rec->odr);
1359     xfree (rec);
1360 }
1361
1362 static const char *marc_iconv_return(ZOOM_record rec, int marc_type,
1363                                      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     yaz_marc_t mt = yaz_marc_create();
1371
1372     *from = '\0';
1373     strcpy(to, "UTF-8");
1374     if (record_charset && *record_charset)
1375     {
1376         /* Use "from,to" or just "from" */
1377         const char *cp =strchr(record_charset, ',');
1378         int clen = strlen(record_charset);
1379         if (cp && cp[1])
1380         {
1381             strncpy( to, cp+1, sizeof(to)-1);
1382             to[sizeof(to)-1] = '\0';
1383             clen = cp - record_charset;
1384         }
1385         if (clen > sizeof(from)-1)
1386             clen = sizeof(from)-1;
1387
1388         if (clen)
1389             strncpy(from, record_charset, clen);
1390         from[clen] = '\0';
1391     }
1392
1393     if (*from && *to)
1394     {
1395         cd = yaz_iconv_open(to, from);
1396         yaz_marc_iconv(mt, cd);
1397     }
1398
1399     yaz_marc_xml(mt, marc_type);
1400     if (!rec->wrbuf_marc)
1401         rec->wrbuf_marc = wrbuf_alloc();
1402     wrbuf_rewind (rec->wrbuf_marc);
1403     if (yaz_marc_decode_wrbuf (mt, buf, sz, rec->wrbuf_marc) > 0)
1404     {
1405         yaz_marc_destroy(mt);
1406         if (cd)
1407             yaz_iconv_close(cd);
1408         if (len)
1409             *len = wrbuf_len(rec->wrbuf_marc);
1410         return wrbuf_buf(rec->wrbuf_marc);
1411     }
1412     yaz_marc_destroy(mt);
1413     if (cd)
1414         yaz_iconv_close(cd);
1415     return 0;
1416 }
1417
1418 static const char *record_iconv_return(ZOOM_record rec, int *len,
1419                                        const char *buf, int sz,
1420                                        const char *record_charset)
1421 {
1422     char to[40];
1423     char from[40];
1424     yaz_iconv_t cd = 0;
1425
1426     *from = '\0';
1427     strcpy(to, "UTF-8");
1428     if (record_charset && *record_charset)
1429     {
1430         /* Use "from,to" or just "from" */
1431         const char *cp =strchr(record_charset, ',');
1432         int clen = strlen(record_charset);
1433         if (cp && cp[1])
1434         {
1435             strncpy( to, cp+1, sizeof(to)-1);
1436             to[sizeof(to)-1] = '\0';
1437             clen = cp - record_charset;
1438         }
1439         if (clen > sizeof(from)-1)
1440             clen = sizeof(from)-1;
1441
1442         if (clen)
1443             strncpy(from, record_charset, clen);
1444         from[clen] = '\0';
1445     }
1446
1447     if (*from && *to && (cd = yaz_iconv_open(to, from)))
1448     {
1449         char outbuf[12];
1450         size_t inbytesleft = sz;
1451         const char *inp = buf;
1452
1453         if (!rec->wrbuf_iconv)
1454             rec->wrbuf_iconv = wrbuf_alloc();
1455
1456         wrbuf_rewind(rec->wrbuf_iconv);
1457
1458         while (inbytesleft)
1459         {
1460             size_t outbytesleft = sizeof(outbuf);
1461             char *outp = outbuf;
1462             size_t r = yaz_iconv (cd, (char**) &inp,
1463                                   &inbytesleft,
1464                                   &outp, &outbytesleft);
1465             if (r == (size_t) (-1))
1466             {
1467                 int e = yaz_iconv_error(cd);
1468                 if (e != YAZ_ICONV_E2BIG)
1469                     break;
1470             }
1471             wrbuf_write(rec->wrbuf_iconv, outbuf, outp - outbuf);
1472         }
1473         wrbuf_puts(rec->wrbuf_iconv, "");
1474         buf = wrbuf_buf(rec->wrbuf_iconv);
1475         sz = wrbuf_len(rec->wrbuf_iconv);
1476         yaz_iconv_close(cd);
1477     }
1478     if (len)
1479         *len = sz;
1480     return buf;
1481 }
1482
1483 ZOOM_API(const char *)
1484 ZOOM_record_get (ZOOM_record rec, const char *type_spec, int *len)
1485 {
1486     char type[40];
1487     char charset[40];
1488     const char *cp;
1489     int i;
1490     Z_NamePlusRecord *npr;
1491
1492     if (len)
1493         *len = 0; /* default return */
1494
1495     if (!rec)
1496         return 0;
1497     npr = rec->npr;
1498     if (!npr)
1499         return 0;
1500
1501     cp = type_spec;
1502     for (i = 0; cp[i] && i < sizeof(type)-1; i++)
1503     {
1504         if (cp[i] == ';' || cp[i] == ' ')
1505             break;
1506         type[i] = cp[i];
1507     }
1508     type[i] = '\0';
1509     charset[0] = '\0';
1510     if (type_spec[i] == ';')
1511     {
1512         i++;
1513         while (type_spec[i] == ' ')
1514             i++;
1515         if (!strncmp(type_spec+i, "charset=", 8))
1516         {
1517             cp = type_spec+i+8;
1518             for (i = 0; cp[i] && i < sizeof(charset)-1; i++)
1519             {
1520                 if (cp[i] == ';' || cp[i] == ' ')
1521                     break;
1522                 charset[i] = cp[i];
1523             }
1524             charset[i] = '\0';
1525         }
1526     }
1527
1528     if (!strcmp (type, "database"))
1529     {
1530         if (len)
1531             *len = (npr->databaseName ? strlen(npr->databaseName) : 0);
1532         return npr->databaseName;
1533     }
1534     else if (!strcmp (type, "syntax"))
1535     {
1536         const char *desc = 0;
1537         if (npr->which == Z_NamePlusRecord_databaseRecord)
1538         {
1539             Z_External *r = (Z_External *) npr->u.databaseRecord;
1540             oident *ent = oid_getentbyoid(r->direct_reference);
1541             if (ent)
1542                 desc = ent->desc;
1543         }
1544         if (!desc)
1545             desc = "none";
1546         if (len)
1547             *len = strlen(desc);
1548         return desc;
1549     }
1550     if (npr->which != Z_NamePlusRecord_databaseRecord)
1551         return 0;
1552
1553     /* from now on - we have a database record .. */
1554     if (!strcmp (type, "render"))
1555     {
1556         Z_External *r = (Z_External *) npr->u.databaseRecord;
1557         oident *ent = oid_getentbyoid(r->direct_reference);
1558
1559         /* render bibliographic record .. */
1560         if (r->which == Z_External_OPAC)
1561         {
1562             r = r->u.opac->bibliographicRecord;
1563             if (!r)
1564                 return 0;
1565             ent = oid_getentbyoid(r->direct_reference);
1566         }
1567         if (r->which == Z_External_sutrs)
1568             return record_iconv_return(rec, len,
1569                                        r->u.sutrs->buf, r->u.sutrs->len,
1570                                        charset);
1571         else if (r->which == Z_External_octet)
1572         {
1573             const char *ret_buf;
1574             switch (ent->value)
1575             {
1576             case VAL_SOIF:
1577             case VAL_HTML:
1578             case VAL_SUTRS:
1579                 break;
1580             case VAL_TEXT_XML:
1581             case VAL_APPLICATION_XML:
1582                 break;
1583             default:
1584                 ret_buf = marc_iconv_return(
1585                     rec, YAZ_MARC_LINE, len,
1586                     (const char *) r->u.octet_aligned->buf,
1587                     r->u.octet_aligned->len,
1588                     charset);
1589                 if (ret_buf)
1590                     return ret_buf;
1591             }
1592             return record_iconv_return(rec, len,
1593                                        (const char *) r->u.octet_aligned->buf,
1594                                        r->u.octet_aligned->len,
1595                                        charset);
1596         }
1597         else if (r->which == Z_External_grs1)
1598         {
1599             if (!rec->wrbuf_marc)
1600                 rec->wrbuf_marc = wrbuf_alloc();
1601             wrbuf_rewind (rec->wrbuf_marc);
1602             yaz_display_grs1(rec->wrbuf_marc, r->u.grs1, 0);
1603             return record_iconv_return(rec, len,
1604                                        wrbuf_buf(rec->wrbuf_marc),
1605                                        wrbuf_len(rec->wrbuf_marc),
1606                                        charset);
1607         }
1608         return 0;
1609     }
1610     else if (!strcmp (type, "xml") || !strcmp(type, "oai"))
1611     {
1612         Z_External *r = (Z_External *) npr->u.databaseRecord;
1613         oident *ent = oid_getentbyoid(r->direct_reference);
1614
1615         /* render bibliographic record .. */
1616         if (r->which == Z_External_OPAC)
1617         {
1618             r = r->u.opac->bibliographicRecord;
1619             if (!r)
1620                 return 0;
1621             ent = oid_getentbyoid(r->direct_reference);
1622         }
1623
1624         if (r->which == Z_External_sutrs)
1625             return record_iconv_return(rec, len,
1626                                        (const char *) r->u.sutrs->buf,
1627                                        r->u.sutrs->len,
1628                                        charset);
1629         else if (r->which == Z_External_octet)
1630         {
1631             const char *ret_buf;
1632             int marc_decode_type = YAZ_MARC_MARCXML;
1633
1634             if (!strcmp(type, "oai"))
1635                 marc_decode_type = YAZ_MARC_OAIMARC;
1636             switch (ent->value)
1637             {
1638             case VAL_SOIF:
1639             case VAL_HTML:
1640             case VAL_SUTRS:
1641                 break;
1642             case VAL_TEXT_XML:
1643             case VAL_APPLICATION_XML:
1644                 break;
1645             default:
1646                 ret_buf = marc_iconv_return(
1647                     rec, marc_decode_type, len,
1648                     (const char *) r->u.octet_aligned->buf,
1649                     r->u.octet_aligned->len,
1650                     charset);
1651                 if (ret_buf)
1652                     return ret_buf;
1653             }
1654             return record_iconv_return(rec, len,
1655                                        (const char *) r->u.octet_aligned->buf,
1656                                        r->u.octet_aligned->len,
1657                                        charset);
1658         }
1659         else if (r->which == Z_External_grs1)
1660         {
1661             if (len) *len = 5;
1662             return "GRS-1";
1663         }
1664         return 0;
1665     }
1666     else if (!strcmp (type, "raw"))
1667     {
1668         Z_External *r = (Z_External *) npr->u.databaseRecord;
1669
1670         if (r->which == Z_External_sutrs)
1671         {
1672             if (len) *len = r->u.sutrs->len;
1673             return (const char *) r->u.sutrs->buf;
1674         }
1675         else if (r->which == Z_External_octet)
1676         {
1677             if (len) *len = r->u.octet_aligned->len;
1678             return (const char *) r->u.octet_aligned->buf;
1679         }
1680         else /* grs-1, explain, OPAC, ... */
1681         {
1682             if (len) *len = -1;
1683             return (const char *) npr->u.databaseRecord;
1684         }
1685         return 0;
1686     }
1687     else if (!strcmp (type, "ext"))
1688     {
1689         if (len) *len = -1;
1690         return (const char *) npr->u.databaseRecord;
1691     }
1692     else if (!strcmp (type, "opac"))
1693
1694     {
1695         Z_External *r = (Z_External *) npr->u.databaseRecord;
1696         if (r->which == Z_External_OPAC)
1697         {
1698             if (!rec->wrbuf_opac)
1699                 rec->wrbuf_opac = wrbuf_alloc();
1700             wrbuf_rewind (rec->wrbuf_opac);
1701             yaz_display_OPAC(rec->wrbuf_opac, r->u.opac, 0);
1702             return record_iconv_return(rec, len,
1703                                        wrbuf_buf(rec->wrbuf_opac),
1704                                        wrbuf_len(rec->wrbuf_opac),
1705                                        charset);
1706         }
1707     }
1708     return 0;
1709 }
1710
1711 static int strcmp_null(const char *v1, const char *v2)
1712 {
1713     if (!v1 && !v2)
1714         return 0;
1715     if (!v1 || !v2)
1716         return -1;
1717     return strcmp(v1, v2);
1718 }
1719
1720 static void record_cache_add (ZOOM_resultset r, Z_NamePlusRecord *npr,
1721                               int pos)
1722 {
1723     ZOOM_record_cache rc;
1724     const char *elementSetName =
1725         ZOOM_resultset_option_get (r, "elementSetName");
1726     const char *syntax =
1727         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1728
1729     ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_RECV_RECORD);
1730     ZOOM_connection_put_event(r->connection, event);
1731
1732     for (rc = r->record_cache; rc; rc = rc->next)
1733     {
1734         if (pos == rc->pos)
1735         {
1736             if (strcmp_null(r->schema, rc->schema))
1737                 continue;
1738             if (strcmp_null(elementSetName,rc->elementSetName))
1739                 continue;
1740             if (strcmp_null(syntax, rc->syntax))
1741                 continue;
1742             /* not destroying rc->npr (it's handled by nmem )*/
1743             rc->rec.npr = npr;
1744             /* keeping wrbuf_marc too */
1745             return;
1746         }
1747     }
1748     rc = (ZOOM_record_cache) odr_malloc (r->odr, sizeof(*rc));
1749     rc->rec.npr = npr;
1750     rc->rec.odr = 0;
1751     rc->rec.wrbuf_marc = 0;
1752     rc->rec.wrbuf_iconv = 0;
1753     rc->rec.wrbuf_opac = 0;
1754     if (elementSetName)
1755         rc->elementSetName = odr_strdup (r->odr, elementSetName);
1756     else
1757         rc->elementSetName = 0;
1758
1759     if (syntax)
1760         rc->syntax = odr_strdup (r->odr, syntax);
1761     else
1762         rc->syntax = 0;
1763
1764     if (r->schema)
1765         rc->schema = odr_strdup (r->odr, r->schema);
1766     else
1767         rc->schema = 0;
1768
1769     rc->pos = pos;
1770     rc->next = r->record_cache;
1771     r->record_cache = rc;
1772 }
1773
1774 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos)
1775 {
1776     ZOOM_record_cache rc;
1777     const char *elementSetName =
1778         ZOOM_resultset_option_get (r, "elementSetName");
1779     const char *syntax =
1780         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1781
1782     for (rc = r->record_cache; rc; rc = rc->next)
1783     {
1784         if (pos == rc->pos)
1785         {
1786             if (strcmp_null(r->schema, rc->schema))
1787                 continue;
1788             if (strcmp_null(elementSetName,rc->elementSetName))
1789                 continue;
1790             if (strcmp_null(syntax, rc->syntax))
1791                 continue;
1792             return &rc->rec;
1793         }
1794     }
1795     return 0;
1796 }
1797
1798 static void handle_records (ZOOM_connection c, Z_Records *sr,
1799                             int present_phase)
1800 {
1801     ZOOM_resultset resultset;
1802
1803     if (!c->tasks)
1804         return ;
1805     switch (c->tasks->which)
1806     {
1807     case ZOOM_TASK_SEARCH:
1808         resultset = c->tasks->u.search.resultset;
1809         break;
1810     case ZOOM_TASK_RETRIEVE:
1811         resultset = c->tasks->u.retrieve.resultset;
1812         break;
1813     default:
1814         return;
1815     }
1816     if (sr && sr->which == Z_Records_NSD)
1817     {
1818         Z_DiagRec dr, *dr_p = &dr;
1819         dr.which = Z_DiagRec_defaultFormat;
1820         dr.u.defaultFormat = sr->u.nonSurrogateDiagnostic;
1821
1822         response_diag (c, dr_p);
1823     }
1824     else if (sr && sr->which == Z_Records_multipleNSD)
1825     {
1826         if (sr->u.multipleNonSurDiagnostics->num_diagRecs >= 1)
1827             response_diag(c, sr->u.multipleNonSurDiagnostics->diagRecs[0]);
1828         else
1829             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1830     }
1831     else
1832     {
1833         if (resultset->count + resultset->start > resultset->size)
1834             resultset->count = resultset->size - resultset->start;
1835         if (resultset->count < 0)
1836             resultset->count = 0;
1837         if (sr && sr->which == Z_Records_DBOSD)
1838         {
1839             int i;
1840             NMEM nmem = odr_extract_mem (c->odr_in);
1841             Z_NamePlusRecordList *p =
1842                 sr->u.databaseOrSurDiagnostics;
1843             for (i = 0; i<p->num_records; i++)
1844             {
1845                 record_cache_add (resultset, p->records[i],
1846                                   i+ resultset->start);
1847             }
1848             /* transfer our response to search_nmem .. we need it later */
1849             nmem_transfer (resultset->odr->mem, nmem);
1850             nmem_destroy (nmem);
1851             if (present_phase && p->num_records == 0)
1852             {
1853                 /* present response and we didn't get any records! */
1854                 set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1855             }
1856         }
1857         else if (present_phase)
1858         {
1859             /* present response and we didn't get any records! */
1860             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1861         }
1862     }
1863 }
1864
1865 static void handle_present_response (ZOOM_connection c, Z_PresentResponse *pr)
1866 {
1867     handle_records (c, pr->records, 1);
1868 }
1869
1870 static void handle_search_response (ZOOM_connection c, Z_SearchResponse *sr)
1871 {
1872     ZOOM_resultset resultset;
1873     ZOOM_Event event;
1874
1875     yaz_log (LOG_DEBUG, "got search response");
1876
1877     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1878         return ;
1879
1880     event = ZOOM_Event_create(ZOOM_EVENT_RECV_SEARCH);
1881     ZOOM_connection_put_event(c, event);
1882
1883     resultset = c->tasks->u.search.resultset;
1884
1885     resultset->size = *sr->resultCount;
1886     handle_records (c, sr->records, 0);
1887 }
1888
1889 static void sort_response (ZOOM_connection c, Z_SortResponse *res)
1890 {
1891     if (res->diagnostics && res->num_diagnostics > 0)
1892         response_diag (c, res->diagnostics[0]);
1893 }
1894
1895 static int scan_response (ZOOM_connection c, Z_ScanResponse *res)
1896 {
1897     NMEM nmem = odr_extract_mem (c->odr_in);
1898     ZOOM_scanset scan;
1899
1900     if (!c->tasks || c->tasks->which != ZOOM_TASK_SCAN)
1901         return 0;
1902     scan = c->tasks->u.scan.scan;
1903
1904     if (res->entries && res->entries->nonsurrogateDiagnostics)
1905         response_diag(c, res->entries->nonsurrogateDiagnostics[0]);
1906     scan->scan_response = res;
1907     nmem_transfer (scan->odr->mem, nmem);
1908     if (res->stepSize)
1909         ZOOM_options_set_int (scan->options, "stepSize", *res->stepSize);
1910     if (res->positionOfTerm)
1911         ZOOM_options_set_int (scan->options, "position", *res->positionOfTerm);
1912     if (res->scanStatus)
1913         ZOOM_options_set_int (scan->options, "scanStatus", *res->scanStatus);
1914     if (res->numberOfEntriesReturned)
1915         ZOOM_options_set_int (scan->options, "number",
1916                               *res->numberOfEntriesReturned);
1917     nmem_destroy (nmem);
1918     return 1;
1919 }
1920
1921 static zoom_ret send_sort (ZOOM_connection c)
1922 {
1923     ZOOM_resultset  resultset;
1924
1925     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1926         return zoom_complete;
1927
1928     resultset = c->tasks->u.search.resultset;
1929
1930     if (c->error)
1931     {
1932         resultset->r_sort_spec = 0;
1933         return zoom_complete;
1934     }
1935     if (resultset->r_sort_spec)
1936     {
1937         Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_sortRequest);
1938         Z_SortRequest *req = apdu->u.sortRequest;
1939
1940         req->num_inputResultSetNames = 1;
1941         req->inputResultSetNames = (Z_InternationalString **)
1942             odr_malloc (c->odr_out, sizeof(*req->inputResultSetNames));
1943         req->inputResultSetNames[0] =
1944             odr_strdup (c->odr_out, resultset->setname);
1945         req->sortedResultSetName = odr_strdup (c->odr_out, resultset->setname);
1946         req->sortSequence = resultset->r_sort_spec;
1947         resultset->r_sort_spec = 0;
1948         return send_APDU (c, apdu);
1949     }
1950     return zoom_complete;
1951 }
1952
1953 static zoom_ret send_present (ZOOM_connection c)
1954 {
1955     Z_APDU *apdu = 0;
1956     Z_PresentRequest *req = 0;
1957     int i = 0;
1958     const char *syntax = 0;
1959     const char *elementSetName = 0;
1960     ZOOM_resultset  resultset;
1961
1962     if (!c->tasks)
1963         return zoom_complete;
1964
1965     switch (c->tasks->which)
1966     {
1967     case ZOOM_TASK_SEARCH:
1968         resultset = c->tasks->u.search.resultset;
1969         break;
1970     case ZOOM_TASK_RETRIEVE:
1971         resultset = c->tasks->u.retrieve.resultset;
1972         resultset->start = c->tasks->u.retrieve.start;
1973         resultset->count = c->tasks->u.retrieve.count;
1974
1975         if (resultset->start >= resultset->size)
1976             return zoom_complete;
1977         if (resultset->start + resultset->count > resultset->size)
1978             resultset->count = resultset->size - resultset->start;
1979         break;
1980     default:
1981         return zoom_complete;
1982     }
1983
1984     syntax = ZOOM_resultset_option_get (resultset, "preferredRecordSyntax");
1985     elementSetName = ZOOM_resultset_option_get (resultset, "elementSetName");
1986
1987     if (c->error)                  /* don't continue on error */
1988         return zoom_complete;
1989     if (resultset->start < 0)
1990         return zoom_complete;
1991     for (i = 0; i<resultset->count; i++)
1992     {
1993         ZOOM_record rec =
1994             record_cache_lookup (resultset, i + resultset->start);
1995         if (!rec)
1996             break;
1997     }
1998     if (i == resultset->count)
1999         return zoom_complete;
2000
2001     apdu = zget_APDU(c->odr_out, Z_APDU_presentRequest);
2002     req = apdu->u.presentRequest;
2003
2004     resultset->start += i;
2005     resultset->count -= i;
2006     *req->resultSetStartPoint = resultset->start + 1;
2007     *req->numberOfRecordsRequested = resultset->step>0 ?
2008         resultset->step : resultset->count;
2009     assert (*req->numberOfRecordsRequested > 0);
2010
2011     if (syntax && *syntax)
2012         req->preferredRecordSyntax =
2013             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
2014
2015     if (resultset->schema && *resultset->schema)
2016     {
2017         Z_RecordComposition *compo = (Z_RecordComposition *)
2018             odr_malloc (c->odr_out, sizeof(*compo));
2019
2020         req->recordComposition = compo;
2021         compo->which = Z_RecordComp_complex;
2022         compo->u.complex = (Z_CompSpec *)
2023             odr_malloc(c->odr_out, sizeof(*compo->u.complex));
2024         compo->u.complex->selectAlternativeSyntax = (bool_t *)
2025             odr_malloc(c->odr_out, sizeof(bool_t));
2026         *compo->u.complex->selectAlternativeSyntax = 0;
2027
2028         compo->u.complex->generic = (Z_Specification *)
2029             odr_malloc(c->odr_out, sizeof(*compo->u.complex->generic));
2030
2031         compo->u.complex->generic->which = Z_Schema_oid;
2032         compo->u.complex->generic->schema.oid = (Odr_oid *)
2033             yaz_str_to_z3950oid (c->odr_out, CLASS_SCHEMA, resultset->schema);
2034
2035         if (!compo->u.complex->generic->schema.oid)
2036         {
2037             /* OID wasn't a schema! Try record syntax instead. */
2038
2039             compo->u.complex->generic->schema.oid = (Odr_oid *)
2040                 yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, resultset->schema);
2041         }
2042         if (elementSetName && *elementSetName)
2043         {
2044             compo->u.complex->generic->elementSpec = (Z_ElementSpec *)
2045                 odr_malloc(c->odr_out, sizeof(Z_ElementSpec));
2046             compo->u.complex->generic->elementSpec->which =
2047                 Z_ElementSpec_elementSetName;
2048             compo->u.complex->generic->elementSpec->u.elementSetName =
2049                 odr_strdup (c->odr_out, elementSetName);
2050         }
2051         else
2052             compo->u.complex->generic->elementSpec = 0;
2053         compo->u.complex->num_dbSpecific = 0;
2054         compo->u.complex->dbSpecific = 0;
2055         compo->u.complex->num_recordSyntax = 0;
2056         compo->u.complex->recordSyntax = 0;
2057     }
2058     else if (elementSetName && *elementSetName)
2059     {
2060         Z_ElementSetNames *esn = (Z_ElementSetNames *)
2061             odr_malloc (c->odr_out, sizeof(*esn));
2062         Z_RecordComposition *compo = (Z_RecordComposition *)
2063             odr_malloc (c->odr_out, sizeof(*compo));
2064
2065         esn->which = Z_ElementSetNames_generic;
2066         esn->u.generic = odr_strdup (c->odr_out, elementSetName);
2067         compo->which = Z_RecordComp_simple;
2068         compo->u.simple = esn;
2069         req->recordComposition = compo;
2070     }
2071     req->resultSetId = odr_strdup(c->odr_out, resultset->setname);
2072     return send_APDU (c, apdu);
2073 }
2074
2075 ZOOM_API(ZOOM_scanset)
2076 ZOOM_connection_scan (ZOOM_connection c, const char *start)
2077 {
2078     ZOOM_scanset scan = (ZOOM_scanset) xmalloc (sizeof(*scan));
2079
2080     scan->connection = c;
2081     scan->odr = odr_createmem (ODR_DECODE);
2082     scan->options = ZOOM_options_create_with_parent (c->options);
2083     scan->refcount = 1;
2084     scan->scan_response = 0;
2085
2086     if ((scan->termListAndStartPoint =
2087          p_query_scan(scan->odr, PROTO_Z3950, &scan->attributeSet,
2088                       start)))
2089     {
2090         ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_SCAN);
2091         task->u.scan.scan = scan;
2092
2093         (scan->refcount)++;
2094         if (!c->async)
2095         {
2096             while (ZOOM_event (1, &c))
2097                 ;
2098         }
2099     }
2100     return scan;
2101 }
2102
2103 ZOOM_API(void)
2104 ZOOM_scanset_destroy (ZOOM_scanset scan)
2105 {
2106     if (!scan)
2107         return;
2108     (scan->refcount)--;
2109     if (scan->refcount == 0)
2110     {
2111         odr_destroy (scan->odr);
2112
2113         ZOOM_options_destroy (scan->options);
2114         xfree (scan);
2115     }
2116 }
2117
2118 static zoom_ret send_package (ZOOM_connection c)
2119 {
2120     ZOOM_Event event;
2121     if (!c->tasks)
2122         return zoom_complete;
2123     assert (c->tasks->which == ZOOM_TASK_PACKAGE);
2124
2125     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
2126     ZOOM_connection_put_event (c, event);
2127
2128     return do_write_ex (c, c->tasks->u.package->buf_out,
2129                         c->tasks->u.package->len_out);
2130 }
2131
2132 static zoom_ret send_scan (ZOOM_connection c)
2133 {
2134     ZOOM_scanset scan;
2135     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_scanRequest);
2136     Z_ScanRequest *req = apdu->u.scanRequest;
2137     if (!c->tasks)
2138         return zoom_complete;
2139     assert (c->tasks->which == ZOOM_TASK_SCAN);
2140     scan = c->tasks->u.scan.scan;
2141
2142     req->termListAndStartPoint = scan->termListAndStartPoint;
2143     req->attributeSet = scan->attributeSet;
2144
2145     *req->numberOfTermsRequested =
2146         ZOOM_options_get_int(scan->options, "number", 10);
2147
2148     req->preferredPositionInResponse =
2149         odr_intdup (c->odr_out,
2150                     ZOOM_options_get_int(scan->options, "position", 1));
2151
2152     req->stepSize =
2153         odr_intdup (c->odr_out,
2154                     ZOOM_options_get_int(scan->options, "stepSize", 0));
2155
2156     req->databaseNames = set_DatabaseNames (c, scan->options,
2157                                             &req->num_databaseNames);
2158
2159     return send_APDU (c, apdu);
2160 }
2161
2162 ZOOM_API(size_t)
2163 ZOOM_scanset_size (ZOOM_scanset scan)
2164 {
2165     if (!scan || !scan->scan_response || !scan->scan_response->entries)
2166         return 0;
2167     return scan->scan_response->entries->num_entries;
2168 }
2169
2170 ZOOM_API(const char *)
2171 ZOOM_scanset_term (ZOOM_scanset scan, size_t pos,
2172                    int *occ, int *len)
2173 {
2174     const char *term = 0;
2175     size_t noent = ZOOM_scanset_size (scan);
2176     Z_ScanResponse *res = scan->scan_response;
2177
2178     *len = 0;
2179     *occ = 0;
2180     if (pos >= noent)
2181         return 0;
2182     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
2183     {
2184         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
2185
2186         if (t->term->which == Z_Term_general)
2187         {
2188             term = (const char *) t->term->u.general->buf;
2189             *len = t->term->u.general->len;
2190         }
2191         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
2192     }
2193     return term;
2194 }
2195
2196 ZOOM_API(const char *)
2197 ZOOM_scanset_display_term (ZOOM_scanset scan, size_t pos,
2198                            int *occ, int *len)
2199 {
2200     const char *term = 0;
2201     size_t noent = ZOOM_scanset_size (scan);
2202     Z_ScanResponse *res = scan->scan_response;
2203
2204     *len = 0;
2205     *occ = 0;
2206     if (pos >= noent)
2207         return 0;
2208     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
2209     {
2210         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
2211
2212         if (t->displayTerm)
2213         {
2214             term = (const char *) t->term->u.general->buf;
2215             *len = strlen(term);
2216         }
2217         else if (t->term->which == Z_Term_general)
2218         {
2219             term = (const char *) t->term->u.general->buf;
2220             *len = t->term->u.general->len;
2221         }
2222         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
2223     }
2224     return term;
2225 }
2226
2227 ZOOM_API(const char *)
2228 ZOOM_scanset_option_get (ZOOM_scanset scan, const char *key)
2229 {
2230     return ZOOM_options_get (scan->options, key);
2231 }
2232
2233 ZOOM_API(void)
2234 ZOOM_scanset_option_set (ZOOM_scanset scan, const char *key,
2235                               const char *val)
2236 {
2237     ZOOM_options_set (scan->options, key, val);
2238 }
2239
2240 static Z_APDU *create_es_package (ZOOM_package p, int type)
2241 {
2242     const char *str;
2243     Z_APDU *apdu = zget_APDU(p->odr_out, Z_APDU_extendedServicesRequest);
2244     Z_ExtendedServicesRequest *req = apdu->u.extendedServicesRequest;
2245
2246     *req->function = Z_ExtendedServicesRequest_create;
2247
2248     str = ZOOM_options_get(p->options, "package-name");
2249     if (str && *str)
2250         req->packageName = nmem_strdup (p->odr_out->mem, str);
2251
2252     str = ZOOM_options_get(p->options, "user-id");
2253     if (str)
2254         req->userId = nmem_strdup (p->odr_out->mem, str);
2255
2256     req->packageType = yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2257                                               type);
2258
2259     str = ZOOM_options_get(p->options, "function");
2260     if (str)
2261     {
2262         if (!strcmp (str, "create"))
2263             *req->function = 1;
2264         if (!strcmp (str, "delete"))
2265             *req->function = 2;
2266         if (!strcmp (str, "modify"))
2267             *req->function = 3;
2268     }
2269     return apdu;
2270 }
2271
2272 static const char *ill_array_lookup (void *clientData, const char *idx)
2273 {
2274     ZOOM_package p = (ZOOM_package) clientData;
2275     return ZOOM_options_get (p->options, idx+4);
2276 }
2277
2278 static Z_External *encode_ill_request (ZOOM_package p)
2279 {
2280     ODR out = p->odr_out;
2281     ILL_Request *req;
2282     Z_External *r = 0;
2283     struct ill_get_ctl ctl;
2284
2285     ctl.odr = p->odr_out;
2286     ctl.clientData = p;
2287     ctl.f = ill_array_lookup;
2288
2289     req = ill_get_ILLRequest(&ctl, "ill", 0);
2290
2291     if (!ill_Request (out, &req, 0, 0))
2292     {
2293         int ill_request_size;
2294         char *ill_request_buf = odr_getbuf (out, &ill_request_size, 0);
2295         if (ill_request_buf)
2296             odr_setbuf (out, ill_request_buf, ill_request_size, 1);
2297         return 0;
2298     }
2299     else
2300     {
2301         oident oid;
2302         int illRequest_size = 0;
2303         char *illRequest_buf = odr_getbuf (out, &illRequest_size, 0);
2304
2305         oid.proto = PROTO_GENERAL;
2306         oid.oclass = CLASS_GENERAL;
2307         oid.value = VAL_ISO_ILL_1;
2308
2309         r = (Z_External *) odr_malloc (out, sizeof(*r));
2310         r->direct_reference = odr_oiddup(out,oid_getoidbyent(&oid));
2311         r->indirect_reference = 0;
2312         r->descriptor = 0;
2313         r->which = Z_External_single;
2314
2315         r->u.single_ASN1_type = (Odr_oct *)
2316             odr_malloc (out, sizeof(*r->u.single_ASN1_type));
2317         r->u.single_ASN1_type->buf = (unsigned char*)
2318             odr_malloc (out, illRequest_size);
2319         r->u.single_ASN1_type->len = illRequest_size;
2320         r->u.single_ASN1_type->size = illRequest_size;
2321         memcpy (r->u.single_ASN1_type->buf, illRequest_buf, illRequest_size);
2322     }
2323     return r;
2324 }
2325
2326 static Z_ItemOrder *encode_item_order(ZOOM_package p)
2327 {
2328     Z_ItemOrder *req = (Z_ItemOrder *) odr_malloc (p->odr_out, sizeof(*req));
2329     const char *str;
2330
2331     req->which=Z_IOItemOrder_esRequest;
2332     req->u.esRequest = (Z_IORequest *)
2333         odr_malloc(p->odr_out,sizeof(Z_IORequest));
2334
2335     /* to keep part ... */
2336     req->u.esRequest->toKeep = (Z_IOOriginPartToKeep *)
2337         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartToKeep));
2338     req->u.esRequest->toKeep->supplDescription = 0;
2339     req->u.esRequest->toKeep->contact = (Z_IOContact *)
2340         odr_malloc (p->odr_out, sizeof(*req->u.esRequest->toKeep->contact));
2341
2342     str = ZOOM_options_get(p->options, "contact-name");
2343     req->u.esRequest->toKeep->contact->name = str ?
2344         nmem_strdup (p->odr_out->mem, str) : 0;
2345
2346     str = ZOOM_options_get(p->options, "contact-phone");
2347     req->u.esRequest->toKeep->contact->phone = str ?
2348         nmem_strdup (p->odr_out->mem, str) : 0;
2349
2350     str = ZOOM_options_get(p->options, "contact-email");
2351     req->u.esRequest->toKeep->contact->email = str ?
2352         nmem_strdup (p->odr_out->mem, str) : 0;
2353
2354     req->u.esRequest->toKeep->addlBilling = 0;
2355
2356     /* not to keep part ... */
2357     req->u.esRequest->notToKeep = (Z_IOOriginPartNotToKeep *)
2358         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartNotToKeep));
2359
2360     str = ZOOM_options_get(p->options, "itemorder-setname");
2361     if (!str)
2362         str = "default";
2363
2364     if (!*str)
2365         req->u.esRequest->notToKeep->resultSetItem = 0;
2366     else
2367     {
2368         req->u.esRequest->notToKeep->resultSetItem = (Z_IOResultSetItem *)
2369            odr_malloc(p->odr_out, sizeof(Z_IOResultSetItem));
2370
2371         req->u.esRequest->notToKeep->resultSetItem->resultSetId =
2372            nmem_strdup (p->odr_out->mem, str);
2373         req->u.esRequest->notToKeep->resultSetItem->item =
2374             (int *) odr_malloc(p->odr_out, sizeof(int));
2375
2376         str = ZOOM_options_get(p->options, "itemorder-item");
2377         *req->u.esRequest->notToKeep->resultSetItem->item =
2378             (str ? atoi(str) : 1);
2379     }
2380     req->u.esRequest->notToKeep->itemRequest = encode_ill_request(p);
2381
2382     return req;
2383 }
2384
2385 Z_APDU *create_admin_package(ZOOM_package p, int type,
2386                              Z_ESAdminOriginPartToKeep **toKeepP,
2387                              Z_ESAdminOriginPartNotToKeep **notToKeepP)
2388 {
2389     Z_APDU *apdu = create_es_package (p, VAL_ADMINSERVICE);
2390     if (apdu)
2391     {
2392         Z_ESAdminOriginPartToKeep  *toKeep;
2393         Z_ESAdminOriginPartNotToKeep  *notToKeep;
2394         Z_External *r = (Z_External *) odr_malloc (p->odr_out, sizeof(*r));
2395         const char *first_db = "Default";
2396         int num_db;
2397         char **db = set_DatabaseNames(p->connection, p->options, &num_db);
2398         if (num_db > 0)
2399             first_db = db[0];
2400
2401         r->direct_reference =
2402             yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2403                                    VAL_ADMINSERVICE);
2404         r->descriptor = 0;
2405         r->indirect_reference = 0;
2406         r->which = Z_External_ESAdmin;
2407
2408         r->u.adminService = (Z_Admin *)
2409             odr_malloc(p->odr_out, sizeof(*r->u.adminService));
2410         r->u.adminService->which = Z_Admin_esRequest;
2411         r->u.adminService->u.esRequest = (Z_AdminEsRequest *)
2412             odr_malloc(p->odr_out, sizeof(*r->u.adminService->u.esRequest));
2413
2414         toKeep = r->u.adminService->u.esRequest->toKeep =
2415             (Z_ESAdminOriginPartToKeep *)
2416             odr_malloc(p->odr_out, sizeof(*r->u.adminService->u.esRequest->toKeep));
2417         toKeep->which=type;
2418         toKeep->databaseName = odr_strdup(p->odr_out, first_db);
2419         toKeep->u.create=odr_nullval();
2420         apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2421
2422         r->u.adminService->u.esRequest->notToKeep = notToKeep =
2423             (Z_ESAdminOriginPartNotToKeep *)
2424             odr_malloc(p->odr_out,
2425                        sizeof(*r->u.adminService->u.esRequest->notToKeep));
2426         notToKeep->which=Z_ESAdminOriginPartNotToKeep_recordsWillFollow;
2427         notToKeep->u.recordsWillFollow=odr_nullval();
2428         if (toKeepP)
2429             *toKeepP = toKeep;
2430         if (notToKeepP)
2431             *notToKeepP = notToKeep;
2432     }
2433     return apdu;
2434 }
2435
2436 static Z_APDU *create_update_package(ZOOM_package p)
2437 {
2438     Z_APDU *apdu = 0;
2439     const char *first_db = "Default";
2440     int num_db;
2441     char **db = set_DatabaseNames(p->connection, p->options, &num_db);
2442     const char *action = ZOOM_options_get(p->options, "action");
2443     const char *recordId = ZOOM_options_get(p->options, "recordId");
2444     const char *record_buf = ZOOM_options_get(p->options, "record");
2445     const char *syntax_str = ZOOM_options_get(p->options, "syntax");
2446     int syntax_oid = VAL_NONE;
2447     int action_no = -1;
2448
2449     if (syntax_str)
2450         syntax_oid = oid_getvalbyname(syntax_str);
2451     if (!record_buf)
2452     {
2453         record_buf = "void";
2454         syntax_oid = VAL_SUTRS;
2455     }
2456     if (syntax_oid != VAL_NONE)
2457         syntax_oid = VAL_TEXT_XML;
2458
2459     if (num_db > 0)
2460         first_db = db[0];
2461
2462     if (!action)
2463         action = "specialUpdate";
2464
2465     if (!strcmp(action, "recordInsert"))
2466         action_no = Z_IUOriginPartToKeep_recordInsert;
2467     else if (!strcmp(action, "recordReplace"))
2468         action_no = Z_IUOriginPartToKeep_recordReplace;
2469     else if (!strcmp(action, "recordDelete"))
2470         action_no = Z_IUOriginPartToKeep_recordDelete;
2471     else if (!strcmp(action, "elementUpdate"))
2472         action_no = Z_IUOriginPartToKeep_elementUpdate;
2473     else if (!strcmp(action, "specialUpdate"))
2474         action_no = Z_IUOriginPartToKeep_specialUpdate;
2475     else
2476         return 0;
2477
2478     apdu = create_es_package (p, VAL_DBUPDATE);
2479     if (apdu)
2480     {
2481         Z_IUOriginPartToKeep *toKeep;
2482         Z_IUSuppliedRecords *notToKeep;
2483         Z_External *r = (Z_External *)
2484             odr_malloc (p->odr_out, sizeof(*r));
2485
2486         apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2487
2488         r->direct_reference =
2489             yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2490                                    VAL_DBUPDATE);
2491         r->descriptor = 0;
2492         r->which = Z_External_update;
2493         r->indirect_reference = 0;
2494         r->u.update = (Z_IUUpdate *)
2495             odr_malloc(p->odr_out, sizeof(*r->u.update));
2496
2497         r->u.update->which = Z_IUUpdate_esRequest;
2498         r->u.update->u.esRequest = (Z_IUUpdateEsRequest *)
2499             odr_malloc(p->odr_out, sizeof(*r->u.update->u.esRequest));
2500         toKeep = r->u.update->u.esRequest->toKeep =
2501             (Z_IUOriginPartToKeep *)
2502             odr_malloc(p->odr_out, sizeof(*toKeep));
2503
2504         toKeep->databaseName = odr_strdup(p->odr_out, first_db);
2505         toKeep->schema = 0;
2506         toKeep->elementSetName = 0;
2507         toKeep->actionQualifier = 0;
2508         toKeep->action = odr_intdup(p->odr_out, action_no);
2509
2510         notToKeep = r->u.update->u.esRequest->notToKeep =
2511             (Z_IUSuppliedRecords *)
2512             odr_malloc(p->odr_out, sizeof(*notToKeep));
2513         notToKeep->num = 1;
2514         notToKeep->elements = (Z_IUSuppliedRecords_elem **)
2515             odr_malloc(p->odr_out, sizeof(*notToKeep->elements));
2516         notToKeep->elements[0] = (Z_IUSuppliedRecords_elem *)
2517             odr_malloc(p->odr_out, sizeof(**notToKeep->elements));
2518         notToKeep->elements[0]->which = Z_IUSuppliedRecords_elem_opaque;
2519         if (recordId)
2520         {
2521             notToKeep->elements[0]->u.opaque = (Odr_oct *)
2522                 odr_malloc (p->odr_out, sizeof(Odr_oct));
2523             notToKeep->elements[0]->u.opaque->size = strlen(recordId);
2524             notToKeep->elements[0]->u.opaque->len = strlen(recordId);
2525             notToKeep->elements[0]->u.opaque->buf =
2526                 odr_strdup(p->odr_out, recordId);
2527         }
2528         else
2529             notToKeep->elements[0]->u.opaque = 0;
2530         notToKeep->elements[0]->supplementalId = 0;
2531         notToKeep->elements[0]->correlationInfo = 0;
2532         notToKeep->elements[0]->record =
2533             z_ext_record(p->odr_out, syntax_oid,
2534                          record_buf, strlen(record_buf));
2535     }
2536     if (0 && apdu)
2537     {
2538        ODR print = odr_createmem(ODR_PRINT);
2539
2540        z_APDU(print, &apdu, 0, 0);
2541        odr_destroy(print);
2542     }
2543     return apdu;
2544 }
2545
2546 ZOOM_API(void)
2547     ZOOM_package_send (ZOOM_package p, const char *type)
2548 {
2549     Z_APDU *apdu = 0;
2550     ZOOM_connection c;
2551     if (!p)
2552         return;
2553     c = p->connection;
2554     odr_reset (p->odr_out);
2555     xfree (p->buf_out);
2556     p->buf_out = 0;
2557     if (!strcmp(type, "itemorder"))
2558     {
2559         apdu = create_es_package (p, VAL_ITEMORDER);
2560         if (apdu)
2561         {
2562             Z_External *r = (Z_External *) odr_malloc (p->odr_out, sizeof(*r));
2563
2564             r->direct_reference =
2565                 yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2566                                        VAL_ITEMORDER);
2567             r->descriptor = 0;
2568             r->which = Z_External_itemOrder;
2569             r->indirect_reference = 0;
2570             r->u.itemOrder = encode_item_order (p);
2571
2572             apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2573         }
2574     }
2575     if (!strcmp(type, "create"))  /* create database */
2576     {
2577         apdu = create_admin_package(p, Z_ESAdminOriginPartToKeep_create,
2578                                     0, 0);
2579     }
2580     if (!strcmp(type, "drop"))  /* drop database */
2581     {
2582         apdu = create_admin_package(p, Z_ESAdminOriginPartToKeep_drop,
2583                                     0, 0);
2584     }
2585     if (!strcmp(type, "update")) /* update record(s) */
2586     {
2587         apdu = create_update_package(p);
2588     }
2589     if (apdu)
2590     {
2591         if (encode_APDU(p->connection, apdu, p->odr_out) == 0)
2592         {
2593             char *buf;
2594
2595             ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_PACKAGE);
2596             task->u.package = p;
2597             buf = odr_getbuf(p->odr_out, &p->len_out, 0);
2598             p->buf_out = (char *) xmalloc (p->len_out);
2599             memcpy (p->buf_out, buf, p->len_out);
2600
2601             (p->refcount)++;
2602             if (!c->async)
2603             {
2604                 while (ZOOM_event (1, &c))
2605                     ;
2606             }
2607         }
2608     }
2609 }
2610
2611 ZOOM_API(ZOOM_package)
2612     ZOOM_connection_package (ZOOM_connection c, ZOOM_options options)
2613 {
2614     ZOOM_package p = (ZOOM_package) xmalloc (sizeof(*p));
2615
2616     p->connection = c;
2617     p->odr_out = odr_createmem (ODR_ENCODE);
2618     p->options = ZOOM_options_create_with_parent2 (options, c->options);
2619     p->refcount = 1;
2620     p->buf_out = 0;
2621     p->len_out = 0;
2622     return p;
2623 }
2624
2625 ZOOM_API(void)
2626     ZOOM_package_destroy(ZOOM_package p)
2627 {
2628     if (!p)
2629         return;
2630     (p->refcount)--;
2631     if (p->refcount == 0)
2632     {
2633         odr_destroy (p->odr_out);
2634         xfree (p->buf_out);
2635
2636         ZOOM_options_destroy (p->options);
2637         xfree (p);
2638     }
2639 }
2640
2641 ZOOM_API(const char *)
2642 ZOOM_package_option_get (ZOOM_package p, const char *key)
2643 {
2644     return ZOOM_options_get (p->options, key);
2645 }
2646
2647
2648 ZOOM_API(void)
2649 ZOOM_package_option_set (ZOOM_package p, const char *key,
2650                               const char *val)
2651 {
2652     ZOOM_options_set (p->options, key, val);
2653 }
2654
2655 static int ZOOM_connection_exec_task (ZOOM_connection c)
2656 {
2657     ZOOM_task task = c->tasks;
2658     zoom_ret ret = zoom_complete;
2659
2660     if (!task)
2661     {
2662         yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task task=<null>");
2663         return 0;
2664     }
2665     yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task type=%d run=%d",
2666              task->which, task->running);
2667     if (c->error != ZOOM_ERROR_NONE)
2668     {
2669         yaz_log (LOG_DEBUG, "remove tasks because of error = %d", c->error);
2670         ZOOM_connection_remove_tasks (c);
2671         return 0;
2672     }
2673     if (task->running)
2674     {
2675         yaz_log (LOG_DEBUG, "task already running");
2676         return 0;
2677     }
2678     task->running = 1;
2679     ret = zoom_complete;
2680     if (c->cs || task->which == ZOOM_TASK_CONNECT)
2681     {
2682         switch (task->which)
2683         {
2684         case ZOOM_TASK_SEARCH:
2685             if (c->proto == PROTO_HTTP)
2686                 ret = ZOOM_connection_srw_send_search(c);
2687             else
2688                 ret = ZOOM_connection_send_search(c);
2689             break;
2690         case ZOOM_TASK_RETRIEVE:
2691             if (c->proto == PROTO_HTTP)
2692                 ret = ZOOM_connection_srw_send_search(c);
2693             else
2694                 ret = send_present (c);
2695             break;
2696         case ZOOM_TASK_CONNECT:
2697             ret = do_connect(c);
2698             break;
2699         case ZOOM_TASK_SCAN:
2700             ret = send_scan(c);
2701             break;
2702         case ZOOM_TASK_PACKAGE:
2703             ret = send_package(c);
2704             break;
2705         }
2706     }
2707     else
2708     {
2709         yaz_log (LOG_DEBUG, "remove tasks because no connection exist");
2710         ZOOM_connection_remove_tasks (c);
2711     }
2712     if (ret == zoom_complete)
2713     {
2714         yaz_log (LOG_DEBUG, "task removed (complete)");
2715         ZOOM_connection_remove_task (c);
2716         return 0;
2717     }
2718     yaz_log (LOG_DEBUG, "task pending");
2719     return 1;
2720 }
2721
2722 static zoom_ret send_sort_present (ZOOM_connection c)
2723 {
2724     zoom_ret r = send_sort (c);
2725     if (r == zoom_complete)
2726         r = send_present (c);
2727     return r;
2728 }
2729
2730 static int es_response (ZOOM_connection c,
2731                         Z_ExtendedServicesResponse *res)
2732 {
2733     if (!c->tasks || c->tasks->which != ZOOM_TASK_PACKAGE)
2734         return 0;
2735     if (res->diagnostics && res->num_diagnostics > 0)
2736         response_diag(c, res->diagnostics[0]);
2737     if (res->taskPackage &&
2738         res->taskPackage->which == Z_External_extendedService)
2739     {
2740         Z_TaskPackage *taskPackage = res->taskPackage->u.extendedService;
2741         Odr_oct *id = taskPackage->targetReference;
2742
2743         if (id)
2744             ZOOM_options_setl (c->tasks->u.package->options,
2745                                "targetReference", (char*) id->buf, id->len);
2746     }
2747     return 1;
2748 }
2749
2750
2751 static void handle_apdu (ZOOM_connection c, Z_APDU *apdu)
2752 {
2753     Z_InitResponse *initrs;
2754
2755     c->mask = 0;
2756     yaz_log (LOG_DEBUG, "recv APDU type=%d", apdu->which);
2757     switch(apdu->which)
2758     {
2759     case Z_APDU_initResponse:
2760         initrs = apdu->u.initResponse;
2761         ZOOM_connection_option_set(c, "serverImplementationId",
2762                                    initrs->implementationId ?
2763                                    initrs->implementationId : "");
2764         ZOOM_connection_option_set(c, "serverImplementationName",
2765                                    initrs->implementationName ?
2766                                    initrs->implementationName : "");
2767         ZOOM_connection_option_set(c, "serverImplementationVersion",
2768                                    initrs->implementationVersion ?
2769                                    initrs->implementationVersion : "");
2770         /* Set the three old options too, for old applications */
2771         ZOOM_connection_option_set(c, "targetImplementationId",
2772                                    initrs->implementationId ?
2773                                    initrs->implementationId : "");
2774         ZOOM_connection_option_set(c, "targetImplementationName",
2775                                    initrs->implementationName ?
2776                                    initrs->implementationName : "");
2777         ZOOM_connection_option_set(c, "targetImplementationVersion",
2778                                    initrs->implementationVersion ?
2779                                    initrs->implementationVersion : "");
2780         if (!*initrs->result)
2781         {
2782             set_ZOOM_error(c, ZOOM_ERROR_INIT, 0);
2783         }
2784         else
2785         {
2786             char *cookie =
2787                 yaz_oi_get_string_oidval (&apdu->u.initResponse->otherInfo,
2788                                           VAL_COOKIE, 1, 0);
2789             xfree (c->cookie_in);
2790             c->cookie_in = 0;
2791             if (cookie)
2792                 c->cookie_in = xstrdup(cookie);
2793             if (ODR_MASK_GET(initrs->options, Z_Options_namedResultSets) &&
2794                 ODR_MASK_GET(initrs->protocolVersion, Z_ProtocolVersion_3))
2795                 c->support_named_resultsets = 1;
2796             if (c->tasks)
2797             {
2798                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2799                 ZOOM_connection_remove_task (c);
2800             }
2801             ZOOM_connection_exec_task (c);
2802         }
2803         if (ODR_MASK_GET(initrs->options, Z_Options_negotiationModel))
2804         {
2805             NMEM tmpmem = nmem_create();
2806             Z_CharSetandLanguageNegotiation *p =
2807                 yaz_get_charneg_record(initrs->otherInfo);
2808
2809             if (p)
2810             {
2811                 char *charset=NULL, *lang=NULL;
2812                 int sel;
2813
2814                 yaz_get_response_charneg(tmpmem, p, &charset, &lang, &sel);
2815                 yaz_log(LOG_DEBUG, "Target accepted: charset %s, "
2816                         "language %s, select %d",
2817                         charset ? charset : "none", lang ? lang : "none", sel);
2818                 if (charset)
2819                     ZOOM_connection_option_set (c, "negotiation-charset",
2820                                                 charset);
2821                 if (lang)
2822                     ZOOM_connection_option_set (c, "negotiation-lang",
2823                                                 lang);
2824                 nmem_destroy(tmpmem);
2825             }
2826         }
2827         break;
2828     case Z_APDU_searchResponse:
2829         handle_search_response (c, apdu->u.searchResponse);
2830         if (send_sort_present (c) == zoom_complete)
2831             ZOOM_connection_remove_task (c);
2832         break;
2833     case Z_APDU_presentResponse:
2834         handle_present_response (c, apdu->u.presentResponse);
2835         if (send_present (c) == zoom_complete)
2836             ZOOM_connection_remove_task (c);
2837         break;
2838     case Z_APDU_sortResponse:
2839         sort_response (c, apdu->u.sortResponse);
2840         if (send_present (c) == zoom_complete)
2841             ZOOM_connection_remove_task (c);
2842         break;
2843     case Z_APDU_scanResponse:
2844         scan_response (c, apdu->u.scanResponse);
2845         ZOOM_connection_remove_task (c);
2846         break;
2847     case Z_APDU_extendedServicesResponse:
2848         es_response (c, apdu->u.extendedServicesResponse);
2849         ZOOM_connection_remove_task (c);
2850         break;
2851     case Z_APDU_close:
2852         if (c->reconnect_ok)
2853         {
2854             do_close(c);
2855             c->tasks->running = 0;
2856             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2857         }
2858         else
2859         {
2860             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2861             do_close(c);
2862         }
2863         break;
2864     default:
2865         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2866         do_close(c);
2867     }
2868 }
2869
2870 #if HAVE_XML2
2871 static void handle_srw_response(ZOOM_connection c,
2872                                 Z_SRW_searchRetrieveResponse *res)
2873 {
2874     ZOOM_resultset resultset = 0;
2875     int i;
2876     NMEM nmem;
2877     ZOOM_Event event;
2878
2879     if (!c->tasks)
2880         return;
2881
2882     if (c->tasks->which == ZOOM_TASK_SEARCH)
2883         resultset = c->tasks->u.search.resultset;
2884     else if (c->tasks->which == ZOOM_TASK_RETRIEVE)
2885         resultset = c->tasks->u.retrieve.resultset;
2886     else
2887         return ;
2888
2889     event = ZOOM_Event_create(ZOOM_EVENT_RECV_SEARCH);
2890     ZOOM_connection_put_event(c, event);
2891
2892     resultset->size = 0;
2893
2894     yaz_log(LOG_DEBUG, "got SRW response OK");
2895
2896     if (res->numberOfRecords)
2897         resultset->size = *res->numberOfRecords;
2898
2899     for (i = 0; i<res->num_records; i++)
2900     {
2901         int pos;
2902
2903         Z_NamePlusRecord *npr = (Z_NamePlusRecord *)
2904             odr_malloc(c->odr_in, sizeof(Z_NamePlusRecord));
2905
2906         if (res->records[i].recordPosition &&
2907             *res->records[i].recordPosition > 0)
2908             pos = *res->records[i].recordPosition - 1;
2909         else
2910             pos = resultset->start + i;
2911
2912         npr->databaseName = 0;
2913         npr->which = Z_NamePlusRecord_databaseRecord;
2914         npr->u.databaseRecord = (Z_External *)
2915             odr_malloc(c->odr_in, sizeof(Z_External));
2916         npr->u.databaseRecord->descriptor = 0;
2917         npr->u.databaseRecord->direct_reference =
2918             yaz_oidval_to_z3950oid(c->odr_in, CLASS_RECSYN, VAL_TEXT_XML);
2919         npr->u.databaseRecord->which = Z_External_octet;
2920         npr->u.databaseRecord->u.octet_aligned = (Odr_oct *)
2921             odr_malloc(c->odr_in, sizeof(Odr_oct));
2922         npr->u.databaseRecord->u.octet_aligned->buf =
2923             res->records[i].recordData_buf;
2924         npr->u.databaseRecord->u.octet_aligned->len =
2925             npr->u.databaseRecord->u.octet_aligned->size =
2926             res->records[i].recordData_len;
2927         record_cache_add (resultset, npr, pos);
2928     }
2929     if (res->num_diagnostics > 0)
2930     {
2931         set_dset_error(c, *res->diagnostics[0].code, "SRW",
2932                        res->diagnostics[0].details, 0);
2933     }
2934     nmem = odr_extract_mem(c->odr_in);
2935     nmem_transfer(resultset->odr->mem, nmem);
2936     nmem_destroy(nmem);
2937 }
2938 #endif
2939
2940 #if HAVE_XML2
2941 static void handle_http(ZOOM_connection c, Z_HTTP_Response *hres)
2942 {
2943     int ret = -1;
2944     const char *content_type = z_HTTP_header_lookup(hres->headers,
2945                                                     "Content-Type");
2946     const char *connection_head = z_HTTP_header_lookup(hres->headers,
2947                                                        "Connection");
2948     c->mask = 0;
2949     yaz_log (LOG_DEBUG, "handle_http");
2950
2951     if (content_type && !yaz_strcmp_del("text/xml", content_type, "; "))
2952     {
2953         Z_SOAP *soap_package = 0;
2954         ODR o = c->odr_in;
2955         Z_SOAP_Handler soap_handlers[2] = {
2956             {"http://www.loc.gov/zing/srw/", 0,
2957              (Z_SOAP_fun) yaz_srw_codec},
2958             {0, 0, 0}
2959         };
2960         ret = z_soap_codec(o, &soap_package,
2961                            &hres->content_buf, &hres->content_len,
2962                            soap_handlers);
2963         if (!ret && soap_package->which == Z_SOAP_generic &&
2964             soap_package->u.generic->no == 0)
2965         {
2966             Z_SRW_PDU *sr = soap_package->u.generic->p;
2967             if (sr->which == Z_SRW_searchRetrieve_response)
2968                 handle_srw_response(c, sr->u.response);
2969             else
2970                 ret = -1;
2971         }
2972         else if (!ret && (soap_package->which == Z_SOAP_fault
2973                           || soap_package->which == Z_SOAP_error))
2974         {
2975             set_HTTP_error(c, hres->code,
2976                            soap_package->u.fault->fault_code,
2977                            soap_package->u.fault->fault_string);
2978         }
2979         else
2980             ret = -1;
2981     }
2982     if (ret)
2983     {
2984         if (hres->code != 200)
2985             set_HTTP_error(c, hres->code, 0, 0);
2986         else
2987             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2988         do_close (c);
2989     }
2990     ZOOM_connection_remove_task(c);
2991     if (!strcmp(hres->version, "1.0"))
2992     {
2993         /* HTTP 1.0: only if Keep-Alive we stay alive.. */
2994         if (!connection_head || strcmp(connection_head, "Keep-Alive"))
2995             do_close(c);
2996     }
2997     else
2998     {
2999         /* HTTP 1.1: only if no close we stay alive .. */
3000         if (connection_head && !strcmp(connection_head, "close"))
3001             do_close(c);
3002     }
3003 }
3004 #endif
3005
3006 static int do_read (ZOOM_connection c)
3007 {
3008     int r, more;
3009     ZOOM_Event event;
3010
3011     event = ZOOM_Event_create (ZOOM_EVENT_RECV_DATA);
3012     ZOOM_connection_put_event (c, event);
3013
3014     r = cs_get (c->cs, &c->buf_in, &c->len_in);
3015     more = cs_more(c->cs);
3016     yaz_log (LOG_DEBUG, "do_read len=%d more=%d", r, more);
3017     if (r == 1)
3018         return 0;
3019     if (r <= 0)
3020     {
3021         if (c->reconnect_ok)
3022         {
3023             do_close (c);
3024             c->reconnect_ok = 0;
3025             yaz_log (LOG_DEBUG, "reconnect read");
3026             c->tasks->running = 0;
3027             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
3028         }
3029         else
3030         {
3031             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
3032             do_close (c);
3033         }
3034     }
3035     else
3036     {
3037         Z_GDU *gdu;
3038         ZOOM_Event event;
3039
3040         odr_reset (c->odr_in);
3041         odr_setbuf (c->odr_in, c->buf_in, r, 0);
3042         event = ZOOM_Event_create (ZOOM_EVENT_RECV_APDU);
3043         ZOOM_connection_put_event (c, event);
3044
3045         if (!z_GDU (c->odr_in, &gdu, 0, 0))
3046         {
3047             int x;
3048             int err = odr_geterrorx(c->odr_in, &x);
3049             char msg[60];
3050             const char *element = odr_getelement(c->odr_in);
3051             sprintf (msg, "ODR code %d:%d element=%-20s",
3052                      err, x, element ? element : "<unknown>");
3053             set_ZOOM_error(c, ZOOM_ERROR_DECODE, msg);
3054             do_close (c);
3055         }
3056         else if (gdu->which == Z_GDU_Z3950)
3057             handle_apdu (c, gdu->u.z3950);
3058         else if (gdu->which == Z_GDU_HTTP_Response)
3059         {
3060 #if HAVE_XML2
3061             handle_http (c, gdu->u.HTTP_Response);
3062 #else
3063             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
3064             do_close (c);
3065 #endif
3066         }
3067         c->reconnect_ok = 0;
3068     }
3069     return 1;
3070 }
3071
3072 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out)
3073 {
3074     int r;
3075     ZOOM_Event event;
3076
3077     event = ZOOM_Event_create(ZOOM_EVENT_SEND_DATA);
3078     ZOOM_connection_put_event (c, event);
3079
3080     yaz_log (LOG_DEBUG, "do_write_ex len=%d", len_out);
3081     if ((r=cs_put (c->cs, buf_out, len_out)) < 0)
3082     {
3083         if (c->reconnect_ok)
3084         {
3085             do_close (c);
3086             c->reconnect_ok = 0;
3087             yaz_log (LOG_DEBUG, "reconnect write");
3088             c->tasks->running = 0;
3089             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
3090             return zoom_pending;
3091         }
3092         if (c->state == STATE_CONNECTING)
3093             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
3094         else
3095             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
3096         do_close (c);
3097         return zoom_complete;
3098     }
3099     else if (r == 1)
3100     {
3101         c->mask = ZOOM_SELECT_EXCEPT;
3102         if (c->cs->io_pending & CS_WANT_WRITE)
3103             c->mask += ZOOM_SELECT_WRITE;
3104         if (c->cs->io_pending & CS_WANT_READ)
3105             c->mask += ZOOM_SELECT_READ;
3106         yaz_log (LOG_DEBUG, "do_write_ex 1 mask=%d", c->mask);
3107     }
3108     else
3109     {
3110         c->mask = ZOOM_SELECT_READ|ZOOM_SELECT_EXCEPT;
3111         yaz_log (LOG_DEBUG, "do_write_ex 2 mask=%d", c->mask);
3112     }
3113     return zoom_pending;
3114 }
3115
3116 static zoom_ret do_write(ZOOM_connection c)
3117 {
3118     return do_write_ex (c, c->buf_out, c->len_out);
3119 }
3120
3121
3122 ZOOM_API(const char *)
3123 ZOOM_connection_option_get (ZOOM_connection c, const char *key)
3124 {
3125     return ZOOM_options_get (c->options, key);
3126 }
3127
3128 ZOOM_API(void)
3129 ZOOM_connection_option_set (ZOOM_connection c, const char *key,
3130                                   const char *val)
3131 {
3132     ZOOM_options_set (c->options, key, val);
3133 }
3134
3135 ZOOM_API(const char *)
3136 ZOOM_resultset_option_get (ZOOM_resultset r, const char *key)
3137 {
3138     return ZOOM_options_get (r->options, key);
3139 }
3140
3141 ZOOM_API(void)
3142 ZOOM_resultset_option_set (ZOOM_resultset r, const char *key,
3143                                   const char *val)
3144 {
3145     ZOOM_options_set (r->options, key, val);
3146 }
3147
3148
3149 ZOOM_API(int)
3150 ZOOM_connection_errcode (ZOOM_connection c)
3151 {
3152     return ZOOM_connection_error (c, 0, 0);
3153 }
3154
3155 ZOOM_API(const char *)
3156 ZOOM_connection_errmsg (ZOOM_connection c)
3157 {
3158     const char *msg;
3159     ZOOM_connection_error (c, &msg, 0);
3160     return msg;
3161 }
3162
3163 ZOOM_API(const char *)
3164 ZOOM_connection_addinfo (ZOOM_connection c)
3165 {
3166     const char *addinfo;
3167     ZOOM_connection_error (c, 0, &addinfo);
3168     return addinfo;
3169 }
3170
3171 ZOOM_API(const char *)
3172 ZOOM_diag_str (int error)
3173 {
3174     switch (error)
3175     {
3176     case ZOOM_ERROR_NONE:
3177         return "No error";
3178     case ZOOM_ERROR_CONNECT:
3179         return "Connect failed";
3180     case ZOOM_ERROR_MEMORY:
3181         return "Out of memory";
3182     case ZOOM_ERROR_ENCODE:
3183         return "Encoding failed";
3184     case ZOOM_ERROR_DECODE:
3185         return "Decoding failed";
3186     case ZOOM_ERROR_CONNECTION_LOST:
3187         return "Connection lost";
3188     case ZOOM_ERROR_INIT:
3189         return "Init rejected";
3190     case ZOOM_ERROR_INTERNAL:
3191         return "Internal failure";
3192     case ZOOM_ERROR_TIMEOUT:
3193         return "Timeout";
3194     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
3195         return "Unsupported protocol";
3196     case ZOOM_ERROR_UNSUPPORTED_QUERY:
3197         return "Unsupported query type";
3198     default:
3199         return diagbib1_str (error);
3200     }
3201 }
3202
3203 ZOOM_API(int)
3204 ZOOM_connection_error_x (ZOOM_connection c, const char **cp,
3205                          const char **addinfo, const char **diagset)
3206 {
3207     int error = c->error;
3208     if (cp)
3209     {
3210         if (!c->diagset || !strcmp(c->diagset, "ZOOM"))
3211             *cp = ZOOM_diag_str(error);
3212         else if (!strcmp(c->diagset, "HTTP"))
3213             *cp = z_HTTP_errmsg(c->error);
3214         else if (!strcmp(c->diagset, "Bib-1"))
3215             *cp = ZOOM_diag_str(error);
3216         else if (!strcmp(c->diagset, "SRW"))
3217             *cp = yaz_diag_srw_str(c->error);
3218         else
3219             *cp = "Unknown error and diagnostic set";
3220     }
3221     if (addinfo)
3222         *addinfo = c->addinfo ? c->addinfo : "";
3223     if (diagset)
3224         *diagset = c->diagset ? c->diagset : "";
3225     return c->error;
3226 }
3227
3228 ZOOM_API(int)
3229 ZOOM_connection_error (ZOOM_connection c, const char **cp,
3230                        const char **addinfo)
3231 {
3232     return ZOOM_connection_error_x(c, cp, addinfo, 0);
3233 }
3234
3235 static int ZOOM_connection_do_io(ZOOM_connection c, int mask)
3236 {
3237     ZOOM_Event event = 0;
3238     int r = cs_look(c->cs);
3239     yaz_log (LOG_DEBUG, "ZOOM_connection_do_io c=%p mask=%d cs_look=%d",
3240              c, mask, r);
3241
3242     if (r == CS_NONE)
3243     {
3244         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
3245         set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
3246         do_close (c);
3247         ZOOM_connection_put_event (c, event);
3248     }
3249     else if (r == CS_CONNECT)
3250     {
3251         int ret;
3252         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
3253
3254         ret = cs_rcvconnect (c->cs);
3255         yaz_log (LOG_DEBUG, "cs_rcvconnect returned %d", ret);
3256         if (ret == 1)
3257         {
3258             c->mask = ZOOM_SELECT_EXCEPT;
3259             if (c->cs->io_pending & CS_WANT_WRITE)
3260                 c->mask += ZOOM_SELECT_WRITE;
3261             if (c->cs->io_pending & CS_WANT_READ)
3262                 c->mask += ZOOM_SELECT_READ;
3263             ZOOM_connection_put_event (c, event);
3264         }
3265         else if (ret == 0)
3266         {
3267             ZOOM_connection_put_event (c, event);
3268             if (c->proto == PROTO_Z3950)
3269                 ZOOM_connection_send_init(c);
3270             else
3271             {
3272                 /* no init request for SRW .. */
3273                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
3274                 ZOOM_connection_remove_task (c);
3275                 c->mask = 0;
3276                 ZOOM_connection_exec_task (c);
3277             }
3278             c->state = STATE_ESTABLISHED;
3279         }
3280         else
3281         {
3282             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
3283             do_close (c);
3284             ZOOM_connection_put_event (c, event);
3285         }
3286     }
3287     else
3288     {
3289         if (mask & ZOOM_SELECT_READ)
3290             do_read (c);
3291         if (c->cs && (mask & ZOOM_SELECT_WRITE))
3292             do_write (c);
3293     }
3294     return 1;
3295 }
3296
3297 ZOOM_API(int)
3298 ZOOM_connection_last_event(ZOOM_connection cs)
3299 {
3300     if (!cs)
3301         return ZOOM_EVENT_NONE;
3302     return cs->last_event;
3303 }
3304
3305 ZOOM_API(int)
3306 ZOOM_event (int no, ZOOM_connection *cs)
3307 {
3308     int timeout = 5000;
3309 #if HAVE_SYS_POLL_H
3310     struct pollfd pollfds[1024];
3311     ZOOM_connection poll_cs[1024];
3312 #else
3313     struct timeval tv;
3314     fd_set input, output, except;
3315 #endif
3316     int i, r, nfds;
3317     int max_fd = 0;
3318
3319     for (i = 0; i<no; i++)
3320     {
3321         ZOOM_connection c = cs[i];
3322         ZOOM_Event event;
3323         if (c && (event = ZOOM_connection_get_event(c)))
3324         {
3325             ZOOM_Event_destroy (event);
3326             return i+1;
3327         }
3328     }
3329     for (i = 0; i<no; i++)
3330     {
3331         ZOOM_connection c = cs[i];
3332         ZOOM_Event event;
3333         if (c && ZOOM_connection_exec_task (c))
3334         {
3335             if ((event = ZOOM_connection_get_event(c)))
3336             {
3337                 ZOOM_Event_destroy (event);
3338                 return i+1;
3339             }
3340         }
3341     }
3342 #if HAVE_SYS_POLL_H
3343
3344 #else
3345     FD_ZERO (&input);
3346     FD_ZERO (&output);
3347     FD_ZERO (&except);
3348 #endif
3349     nfds = 0;
3350     for (i = 0; i<no; i++)
3351     {
3352         ZOOM_connection c = cs[i];
3353         int fd, mask;
3354         int this_timeout;
3355
3356         if (!c)
3357             continue;
3358         fd = z3950_connection_socket(c);
3359         mask = z3950_connection_mask(c);
3360
3361         if (fd == -1)
3362             continue;
3363         if (max_fd < fd)
3364             max_fd = fd;
3365
3366         this_timeout = ZOOM_options_get_int (c->options, "timeout", -1);
3367         if (this_timeout != -1 && this_timeout < timeout)
3368             timeout = this_timeout;
3369 #if HAVE_SYS_POLL_H
3370         if (mask)
3371         {
3372             short poll_events = 0;
3373
3374             if (mask & ZOOM_SELECT_READ)
3375                 poll_events += POLLIN;
3376             if (mask & ZOOM_SELECT_WRITE)
3377                 poll_events += POLLOUT;
3378             if (mask & ZOOM_SELECT_EXCEPT)
3379                 poll_events += POLLERR;
3380             pollfds[nfds].fd = fd;
3381             pollfds[nfds].events = poll_events;
3382             pollfds[nfds].revents = 0;
3383             poll_cs[nfds] = c;
3384             nfds++;
3385         }
3386 #else
3387         if (mask & ZOOM_SELECT_READ)
3388         {
3389             FD_SET (fd, &input);
3390             nfds++;
3391         }
3392         if (mask & ZOOM_SELECT_WRITE)
3393         {
3394             FD_SET (fd, &output);
3395             nfds++;
3396         }
3397         if (mask & ZOOM_SELECT_EXCEPT)
3398         {
3399             FD_SET (fd, &except);
3400             nfds++;
3401         }
3402 #endif
3403     }
3404     if (timeout >= 5000)
3405         timeout = 30;
3406
3407     if (!nfds)
3408         return 0;
3409
3410 #if HAVE_SYS_POLL_H
3411     r = poll (pollfds, nfds, timeout * 1000);
3412     for (i = 0; i<nfds; i++)
3413     {
3414         ZOOM_connection c = poll_cs[i];
3415         if (r && c->mask)
3416         {
3417             int mask = 0;
3418             if (pollfds[i].revents & POLLIN)
3419                 mask += ZOOM_SELECT_READ;
3420             if (pollfds[i].revents & POLLOUT)
3421                 mask += ZOOM_SELECT_WRITE;
3422             if (pollfds[i].revents & POLLERR)
3423                 mask += ZOOM_SELECT_EXCEPT;
3424             if (mask)
3425                 ZOOM_connection_do_io(c, mask);
3426         }
3427         else if (r == 0 && c->mask)
3428         {
3429             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
3430             /* timeout and this connection was waiting */
3431             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
3432             do_close (c);
3433             ZOOM_connection_put_event(c, event);
3434         }
3435     }
3436 #else
3437     tv.tv_sec = timeout;
3438     tv.tv_usec = 0;
3439     yaz_log (LOG_DEBUG, "select start");
3440     r = select (max_fd+1, &input, &output, &except, &tv);
3441     yaz_log (LOG_DEBUG, "select stop, returned r=%d", r);
3442     for (i = 0; i<no; i++)
3443     {
3444         ZOOM_connection c = cs[i];
3445         int fd, mask;
3446
3447         if (!c)
3448             continue;
3449         fd = z3950_connection_socket(c);
3450         mask = 0;
3451         if (r && c->mask)
3452         {
3453             /* no timeout and real socket */
3454             if (FD_ISSET(fd, &input))
3455                 mask += ZOOM_SELECT_READ;
3456             if (FD_ISSET(fd, &output))
3457                 mask += ZOOM_SELECT_WRITE;
3458             if (FD_ISSET(fd, &except))
3459                 mask += ZOOM_SELECT_EXCEPT;
3460             if (mask)
3461                 ZOOM_connection_do_io(c, mask);
3462         }
3463         if (r == 0 && c->mask)
3464         {
3465             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
3466             /* timeout and this connection was waiting */
3467             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
3468             do_close (c);
3469             yaz_log (LOG_DEBUG, "timeout");
3470             ZOOM_connection_put_event(c, event);
3471         }
3472     }
3473 #endif
3474     for (i = 0; i<no; i++)
3475     {
3476         ZOOM_connection c = cs[i];
3477         ZOOM_Event event;
3478         if (c && (event = ZOOM_connection_get_event(c)))
3479         {
3480             ZOOM_Event_destroy (event);
3481             return i+1;
3482         }
3483     }
3484     return 0;
3485 }