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 1.12 2003-12-20 00:51:19 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: 1.12 $");
 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);
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             yaz_marc_t mt;
1574             const char *ret_buf;
1575             switch (ent->value)
1576             {
1577             case VAL_SOIF:
1578             case VAL_HTML:
1579             case VAL_SUTRS:
1580                 break;
1581             case VAL_TEXT_XML:
1582             case VAL_APPLICATION_XML:
1583                 break;
1584             default:
1585                 ret_buf = marc_iconv_return(
1586                     rec, YAZ_MARC_LINE, len,
1587                     (const char *) r->u.octet_aligned->buf,
1588                     r->u.octet_aligned->len,
1589                     charset);
1590                 if (ret_buf)
1591                     return ret_buf;
1592             }
1593             return record_iconv_return(rec, len,
1594                                        (const char *) r->u.octet_aligned->buf,
1595                                        r->u.octet_aligned->len,
1596                                        charset);
1597         }
1598         else if (r->which == Z_External_grs1)
1599         {
1600             if (!rec->wrbuf_marc)
1601                 rec->wrbuf_marc = wrbuf_alloc();
1602             wrbuf_rewind (rec->wrbuf_marc);
1603             yaz_display_grs1(rec->wrbuf_marc, r->u.grs1, 0);
1604             return record_iconv_return(rec, len,
1605                                        wrbuf_buf(rec->wrbuf_marc),
1606                                        wrbuf_len(rec->wrbuf_marc),
1607                                        charset);
1608         }
1609         return 0;
1610     }
1611     else if (!strcmp (type, "xml") || !strcmp(type, "oai"))
1612     {
1613         Z_External *r = (Z_External *) npr->u.databaseRecord;
1614         oident *ent = oid_getentbyoid(r->direct_reference);
1615
1616         /* render bibliographic record .. */
1617         if (r->which == Z_External_OPAC)
1618         {
1619             r = r->u.opac->bibliographicRecord;
1620             if (!r)
1621                 return 0;
1622             ent = oid_getentbyoid(r->direct_reference);
1623         }
1624
1625         if (r->which == Z_External_sutrs)
1626             return record_iconv_return(rec, len,
1627                                        (const char *) r->u.sutrs->buf,
1628                                        r->u.sutrs->len,
1629                                        charset);
1630         else if (r->which == Z_External_octet)
1631         {
1632             const char *ret_buf;
1633             yaz_marc_t mt;
1634             int marc_decode_type = YAZ_MARC_MARCXML;
1635
1636             if (!strcmp(type, "oai"))
1637                 marc_decode_type = YAZ_MARC_OAIMARC;
1638             switch (ent->value)
1639             {
1640             case VAL_SOIF:
1641             case VAL_HTML:
1642             case VAL_SUTRS:
1643                 break;
1644             case VAL_TEXT_XML:
1645             case VAL_APPLICATION_XML:
1646                 break;
1647             default:
1648                 ret_buf = marc_iconv_return(
1649                     rec, marc_decode_type, len,
1650                     (const char *) r->u.octet_aligned->buf,
1651                     r->u.octet_aligned->len,
1652                     charset);
1653                 if (ret_buf)
1654                     return ret_buf;
1655             }
1656             return record_iconv_return(rec, len,
1657                                        (const char *) r->u.octet_aligned->buf,
1658                                        r->u.octet_aligned->len,
1659                                        charset);
1660         }
1661         else if (r->which == Z_External_grs1)
1662         {
1663             if (len) *len = 5;
1664             return "GRS-1";
1665         }
1666         return 0;
1667     }
1668     else if (!strcmp (type, "raw"))
1669     {
1670         Z_External *r = (Z_External *) npr->u.databaseRecord;
1671
1672         if (r->which == Z_External_sutrs)
1673         {
1674             if (len) *len = r->u.sutrs->len;
1675             return (const char *) r->u.sutrs->buf;
1676         }
1677         else if (r->which == Z_External_octet)
1678         {
1679             if (len) *len = r->u.octet_aligned->len;
1680             return (const char *) r->u.octet_aligned->buf;
1681         }
1682         else /* grs-1, explain, OPAC, ... */
1683         {
1684             if (len) *len = -1;
1685             return (const char *) npr->u.databaseRecord;
1686         }
1687         return 0;
1688     }
1689     else if (!strcmp (type, "ext"))
1690     {
1691         if (len) *len = -1;
1692         return (const char *) npr->u.databaseRecord;
1693     }
1694     else if (!strcmp (type, "opac"))
1695
1696     {
1697         Z_External *r = (Z_External *) npr->u.databaseRecord;
1698         if (r->which == Z_External_OPAC)
1699         {
1700             if (!rec->wrbuf_opac)
1701                 rec->wrbuf_opac = wrbuf_alloc();
1702             wrbuf_rewind (rec->wrbuf_opac);
1703             yaz_display_OPAC(rec->wrbuf_opac, r->u.opac, 0);
1704             return record_iconv_return(rec, len,
1705                                        wrbuf_buf(rec->wrbuf_opac),
1706                                        wrbuf_len(rec->wrbuf_opac),
1707                                        charset);
1708         }
1709     }
1710     return 0;
1711 }
1712
1713 static int strcmp_null(const char *v1, const char *v2)
1714 {
1715     if (!v1 && !v2)
1716         return 0;
1717     if (!v1 || !v2)
1718         return -1;
1719     return strcmp(v1, v2);
1720 }
1721
1722 static void record_cache_add (ZOOM_resultset r, Z_NamePlusRecord *npr,
1723                               int pos)
1724 {
1725     ZOOM_record_cache rc;
1726     const char *elementSetName =
1727         ZOOM_resultset_option_get (r, "elementSetName");
1728     const char *syntax =
1729         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1730
1731     ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_RECV_RECORD);
1732     ZOOM_connection_put_event(r->connection, event);
1733
1734     for (rc = r->record_cache; rc; rc = rc->next)
1735     {
1736         if (pos == rc->pos)
1737         {
1738             if (strcmp_null(r->schema, rc->schema))
1739                 continue;
1740             if (strcmp_null(elementSetName,rc->elementSetName))
1741                 continue;
1742             if (strcmp_null(syntax, rc->syntax))
1743                 continue;
1744             /* not destroying rc->npr (it's handled by nmem )*/
1745             rc->rec.npr = npr;
1746             /* keeping wrbuf_marc too */
1747             return;
1748         }
1749     }
1750     rc = (ZOOM_record_cache) odr_malloc (r->odr, sizeof(*rc));
1751     rc->rec.npr = npr;
1752     rc->rec.odr = 0;
1753     rc->rec.wrbuf_marc = 0;
1754     rc->rec.wrbuf_iconv = 0;
1755     rc->rec.wrbuf_opac = 0;
1756     if (elementSetName)
1757         rc->elementSetName = odr_strdup (r->odr, elementSetName);
1758     else
1759         rc->elementSetName = 0;
1760
1761     if (syntax)
1762         rc->syntax = odr_strdup (r->odr, syntax);
1763     else
1764         rc->syntax = 0;
1765
1766     if (r->schema)
1767         rc->schema = odr_strdup (r->odr, r->schema);
1768     else
1769         rc->schema = 0;
1770
1771     rc->pos = pos;
1772     rc->next = r->record_cache;
1773     r->record_cache = rc;
1774 }
1775
1776 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos)
1777 {
1778     ZOOM_record_cache rc;
1779     const char *elementSetName =
1780         ZOOM_resultset_option_get (r, "elementSetName");
1781     const char *syntax =
1782         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1783
1784     for (rc = r->record_cache; rc; rc = rc->next)
1785     {
1786         if (pos == rc->pos)
1787         {
1788             if (strcmp_null(r->schema, rc->schema))
1789                 continue;
1790             if (strcmp_null(elementSetName,rc->elementSetName))
1791                 continue;
1792             if (strcmp_null(syntax, rc->syntax))
1793                 continue;
1794             return &rc->rec;
1795         }
1796     }
1797     return 0;
1798 }
1799
1800 static void handle_records (ZOOM_connection c, Z_Records *sr,
1801                             int present_phase)
1802 {
1803     ZOOM_resultset resultset;
1804
1805     if (!c->tasks)
1806         return ;
1807     switch (c->tasks->which)
1808     {
1809     case ZOOM_TASK_SEARCH:
1810         resultset = c->tasks->u.search.resultset;
1811         break;
1812     case ZOOM_TASK_RETRIEVE:
1813         resultset = c->tasks->u.retrieve.resultset;
1814         break;
1815     default:
1816         return;
1817     }
1818     if (sr && sr->which == Z_Records_NSD)
1819     {
1820         Z_DiagRec dr, *dr_p = &dr;
1821         dr.which = Z_DiagRec_defaultFormat;
1822         dr.u.defaultFormat = sr->u.nonSurrogateDiagnostic;
1823
1824         response_diag (c, dr_p);
1825     }
1826     else if (sr && sr->which == Z_Records_multipleNSD)
1827     {
1828         if (sr->u.multipleNonSurDiagnostics->num_diagRecs >= 1)
1829             response_diag(c, sr->u.multipleNonSurDiagnostics->diagRecs[0]);
1830         else
1831             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1832     }
1833     else
1834     {
1835         if (resultset->count + resultset->start > resultset->size)
1836             resultset->count = resultset->size - resultset->start;
1837         if (resultset->count < 0)
1838             resultset->count = 0;
1839         if (sr && sr->which == Z_Records_DBOSD)
1840         {
1841             int i;
1842             NMEM nmem = odr_extract_mem (c->odr_in);
1843             Z_NamePlusRecordList *p =
1844                 sr->u.databaseOrSurDiagnostics;
1845             for (i = 0; i<p->num_records; i++)
1846             {
1847                 record_cache_add (resultset, p->records[i],
1848                                   i+ resultset->start);
1849             }
1850             /* transfer our response to search_nmem .. we need it later */
1851             nmem_transfer (resultset->odr->mem, nmem);
1852             nmem_destroy (nmem);
1853             if (present_phase && p->num_records == 0)
1854             {
1855                 /* present response and we didn't get any records! */
1856                 set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1857             }
1858         }
1859         else if (present_phase)
1860         {
1861             /* present response and we didn't get any records! */
1862             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1863         }
1864     }
1865 }
1866
1867 static void handle_present_response (ZOOM_connection c, Z_PresentResponse *pr)
1868 {
1869     handle_records (c, pr->records, 1);
1870 }
1871
1872 static void handle_search_response (ZOOM_connection c, Z_SearchResponse *sr)
1873 {
1874     ZOOM_resultset resultset;
1875     ZOOM_Event event;
1876
1877     yaz_log (LOG_DEBUG, "got search response");
1878
1879     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1880         return ;
1881
1882     event = ZOOM_Event_create(ZOOM_EVENT_RECV_SEARCH);
1883     ZOOM_connection_put_event(c, event);
1884
1885     resultset = c->tasks->u.search.resultset;
1886
1887     resultset->size = *sr->resultCount;
1888     handle_records (c, sr->records, 0);
1889 }
1890
1891 static void sort_response (ZOOM_connection c, Z_SortResponse *res)
1892 {
1893     if (res->diagnostics && res->num_diagnostics > 0)
1894         response_diag (c, res->diagnostics[0]);
1895 }
1896
1897 static int scan_response (ZOOM_connection c, Z_ScanResponse *res)
1898 {
1899     NMEM nmem = odr_extract_mem (c->odr_in);
1900     ZOOM_scanset scan;
1901
1902     if (!c->tasks || c->tasks->which != ZOOM_TASK_SCAN)
1903         return 0;
1904     scan = c->tasks->u.scan.scan;
1905
1906     if (res->entries && res->entries->nonsurrogateDiagnostics)
1907         response_diag(c, res->entries->nonsurrogateDiagnostics[0]);
1908     scan->scan_response = res;
1909     nmem_transfer (scan->odr->mem, nmem);
1910     if (res->stepSize)
1911         ZOOM_options_set_int (scan->options, "stepSize", *res->stepSize);
1912     if (res->positionOfTerm)
1913         ZOOM_options_set_int (scan->options, "position", *res->positionOfTerm);
1914     if (res->scanStatus)
1915         ZOOM_options_set_int (scan->options, "scanStatus", *res->scanStatus);
1916     if (res->numberOfEntriesReturned)
1917         ZOOM_options_set_int (scan->options, "number",
1918                               *res->numberOfEntriesReturned);
1919     nmem_destroy (nmem);
1920     return 1;
1921 }
1922
1923 static zoom_ret send_sort (ZOOM_connection c)
1924 {
1925     ZOOM_resultset  resultset;
1926
1927     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1928         return zoom_complete;
1929
1930     resultset = c->tasks->u.search.resultset;
1931
1932     if (c->error)
1933     {
1934         resultset->r_sort_spec = 0;
1935         return zoom_complete;
1936     }
1937     if (resultset->r_sort_spec)
1938     {
1939         Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_sortRequest);
1940         Z_SortRequest *req = apdu->u.sortRequest;
1941
1942         req->num_inputResultSetNames = 1;
1943         req->inputResultSetNames = (Z_InternationalString **)
1944             odr_malloc (c->odr_out, sizeof(*req->inputResultSetNames));
1945         req->inputResultSetNames[0] =
1946             odr_strdup (c->odr_out, resultset->setname);
1947         req->sortedResultSetName = odr_strdup (c->odr_out, resultset->setname);
1948         req->sortSequence = resultset->r_sort_spec;
1949         resultset->r_sort_spec = 0;
1950         return send_APDU (c, apdu);
1951     }
1952     return zoom_complete;
1953 }
1954
1955 static zoom_ret send_present (ZOOM_connection c)
1956 {
1957     Z_APDU *apdu = 0;
1958     Z_PresentRequest *req = 0;
1959     int i = 0;
1960     const char *syntax = 0;
1961     const char *elementSetName = 0;
1962     ZOOM_resultset  resultset;
1963
1964     if (!c->tasks)
1965         return zoom_complete;
1966
1967     switch (c->tasks->which)
1968     {
1969     case ZOOM_TASK_SEARCH:
1970         resultset = c->tasks->u.search.resultset;
1971         break;
1972     case ZOOM_TASK_RETRIEVE:
1973         resultset = c->tasks->u.retrieve.resultset;
1974         resultset->start = c->tasks->u.retrieve.start;
1975         resultset->count = c->tasks->u.retrieve.count;
1976
1977         if (resultset->start >= resultset->size)
1978             return zoom_complete;
1979         if (resultset->start + resultset->count > resultset->size)
1980             resultset->count = resultset->size - resultset->start;
1981         break;
1982     default:
1983         return zoom_complete;
1984     }
1985
1986     syntax = ZOOM_resultset_option_get (resultset, "preferredRecordSyntax");
1987     elementSetName = ZOOM_resultset_option_get (resultset, "elementSetName");
1988
1989     if (c->error)                  /* don't continue on error */
1990         return zoom_complete;
1991     if (resultset->start < 0)
1992         return zoom_complete;
1993     for (i = 0; i<resultset->count; i++)
1994     {
1995         ZOOM_record rec =
1996             record_cache_lookup (resultset, i + resultset->start);
1997         if (!rec)
1998             break;
1999     }
2000     if (i == resultset->count)
2001         return zoom_complete;
2002
2003     apdu = zget_APDU(c->odr_out, Z_APDU_presentRequest);
2004     req = apdu->u.presentRequest;
2005
2006     resultset->start += i;
2007     resultset->count -= i;
2008     *req->resultSetStartPoint = resultset->start + 1;
2009     *req->numberOfRecordsRequested = resultset->step>0 ?
2010         resultset->step : resultset->count;
2011     assert (*req->numberOfRecordsRequested > 0);
2012
2013     if (syntax && *syntax)
2014         req->preferredRecordSyntax =
2015             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
2016
2017     if (resultset->schema && *resultset->schema)
2018     {
2019         Z_RecordComposition *compo = (Z_RecordComposition *)
2020             odr_malloc (c->odr_out, sizeof(*compo));
2021
2022         req->recordComposition = compo;
2023         compo->which = Z_RecordComp_complex;
2024         compo->u.complex = (Z_CompSpec *)
2025             odr_malloc(c->odr_out, sizeof(*compo->u.complex));
2026         compo->u.complex->selectAlternativeSyntax = (bool_t *)
2027             odr_malloc(c->odr_out, sizeof(bool_t));
2028         *compo->u.complex->selectAlternativeSyntax = 0;
2029
2030         compo->u.complex->generic = (Z_Specification *)
2031             odr_malloc(c->odr_out, sizeof(*compo->u.complex->generic));
2032
2033         compo->u.complex->generic->which = Z_Schema_oid;
2034         compo->u.complex->generic->schema.oid = (Odr_oid *)
2035             yaz_str_to_z3950oid (c->odr_out, CLASS_SCHEMA, resultset->schema);
2036
2037         if (!compo->u.complex->generic->schema.oid)
2038         {
2039             /* OID wasn't a schema! Try record syntax instead. */
2040
2041             compo->u.complex->generic->schema.oid = (Odr_oid *)
2042                 yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, resultset->schema);
2043         }
2044         if (elementSetName && *elementSetName)
2045         {
2046             compo->u.complex->generic->elementSpec = (Z_ElementSpec *)
2047                 odr_malloc(c->odr_out, sizeof(Z_ElementSpec));
2048             compo->u.complex->generic->elementSpec->which =
2049                 Z_ElementSpec_elementSetName;
2050             compo->u.complex->generic->elementSpec->u.elementSetName =
2051                 odr_strdup (c->odr_out, elementSetName);
2052         }
2053         else
2054             compo->u.complex->generic->elementSpec = 0;
2055         compo->u.complex->num_dbSpecific = 0;
2056         compo->u.complex->dbSpecific = 0;
2057         compo->u.complex->num_recordSyntax = 0;
2058         compo->u.complex->recordSyntax = 0;
2059     }
2060     else if (elementSetName && *elementSetName)
2061     {
2062         Z_ElementSetNames *esn = (Z_ElementSetNames *)
2063             odr_malloc (c->odr_out, sizeof(*esn));
2064         Z_RecordComposition *compo = (Z_RecordComposition *)
2065             odr_malloc (c->odr_out, sizeof(*compo));
2066
2067         esn->which = Z_ElementSetNames_generic;
2068         esn->u.generic = odr_strdup (c->odr_out, elementSetName);
2069         compo->which = Z_RecordComp_simple;
2070         compo->u.simple = esn;
2071         req->recordComposition = compo;
2072     }
2073     req->resultSetId = odr_strdup(c->odr_out, resultset->setname);
2074     return send_APDU (c, apdu);
2075 }
2076
2077 ZOOM_API(ZOOM_scanset)
2078 ZOOM_connection_scan (ZOOM_connection c, const char *start)
2079 {
2080     ZOOM_scanset scan = (ZOOM_scanset) xmalloc (sizeof(*scan));
2081
2082     scan->connection = c;
2083     scan->odr = odr_createmem (ODR_DECODE);
2084     scan->options = ZOOM_options_create_with_parent (c->options);
2085     scan->refcount = 1;
2086     scan->scan_response = 0;
2087
2088     if ((scan->termListAndStartPoint =
2089          p_query_scan(scan->odr, PROTO_Z3950, &scan->attributeSet,
2090                       start)))
2091     {
2092         ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_SCAN);
2093         task->u.scan.scan = scan;
2094
2095         (scan->refcount)++;
2096         if (!c->async)
2097         {
2098             while (ZOOM_event (1, &c))
2099                 ;
2100         }
2101     }
2102     return scan;
2103 }
2104
2105 ZOOM_API(void)
2106 ZOOM_scanset_destroy (ZOOM_scanset scan)
2107 {
2108     if (!scan)
2109         return;
2110     (scan->refcount)--;
2111     if (scan->refcount == 0)
2112     {
2113         odr_destroy (scan->odr);
2114
2115         ZOOM_options_destroy (scan->options);
2116         xfree (scan);
2117     }
2118 }
2119
2120 static zoom_ret send_package (ZOOM_connection c)
2121 {
2122     ZOOM_Event event;
2123     if (!c->tasks)
2124         return zoom_complete;
2125     assert (c->tasks->which == ZOOM_TASK_PACKAGE);
2126
2127     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
2128     ZOOM_connection_put_event (c, event);
2129
2130     return do_write_ex (c, c->tasks->u.package->buf_out,
2131                         c->tasks->u.package->len_out);
2132 }
2133
2134 static zoom_ret send_scan (ZOOM_connection c)
2135 {
2136     ZOOM_scanset scan;
2137     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_scanRequest);
2138     Z_ScanRequest *req = apdu->u.scanRequest;
2139     if (!c->tasks)
2140         return zoom_complete;
2141     assert (c->tasks->which == ZOOM_TASK_SCAN);
2142     scan = c->tasks->u.scan.scan;
2143
2144     req->termListAndStartPoint = scan->termListAndStartPoint;
2145     req->attributeSet = scan->attributeSet;
2146
2147     *req->numberOfTermsRequested =
2148         ZOOM_options_get_int(scan->options, "number", 10);
2149
2150     req->preferredPositionInResponse =
2151         odr_intdup (c->odr_out,
2152                     ZOOM_options_get_int(scan->options, "position", 1));
2153
2154     req->stepSize =
2155         odr_intdup (c->odr_out,
2156                     ZOOM_options_get_int(scan->options, "stepSize", 0));
2157
2158     req->databaseNames = set_DatabaseNames (c, scan->options,
2159                                             &req->num_databaseNames);
2160
2161     return send_APDU (c, apdu);
2162 }
2163
2164 ZOOM_API(size_t)
2165 ZOOM_scanset_size (ZOOM_scanset scan)
2166 {
2167     if (!scan || !scan->scan_response || !scan->scan_response->entries)
2168         return 0;
2169     return scan->scan_response->entries->num_entries;
2170 }
2171
2172 ZOOM_API(const char *)
2173 ZOOM_scanset_term (ZOOM_scanset scan, size_t pos,
2174                    int *occ, int *len)
2175 {
2176     const char *term = 0;
2177     size_t noent = ZOOM_scanset_size (scan);
2178     Z_ScanResponse *res = scan->scan_response;
2179
2180     *len = 0;
2181     *occ = 0;
2182     if (pos >= noent)
2183         return 0;
2184     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
2185     {
2186         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
2187
2188         if (t->term->which == Z_Term_general)
2189         {
2190             term = (const char *) t->term->u.general->buf;
2191             *len = t->term->u.general->len;
2192         }
2193         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
2194     }
2195     return term;
2196 }
2197
2198 ZOOM_API(const char *)
2199 ZOOM_scanset_display_term (ZOOM_scanset scan, size_t pos,
2200                            int *occ, int *len)
2201 {
2202     const char *term = 0;
2203     size_t noent = ZOOM_scanset_size (scan);
2204     Z_ScanResponse *res = scan->scan_response;
2205
2206     *len = 0;
2207     *occ = 0;
2208     if (pos >= noent)
2209         return 0;
2210     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
2211     {
2212         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
2213
2214         if (t->displayTerm)
2215         {
2216             term = (const char *) t->term->u.general->buf;
2217             *len = strlen(term);
2218         }
2219         else if (t->term->which == Z_Term_general)
2220         {
2221             term = (const char *) t->term->u.general->buf;
2222             *len = t->term->u.general->len;
2223         }
2224         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
2225     }
2226     return term;
2227 }
2228
2229 ZOOM_API(const char *)
2230 ZOOM_scanset_option_get (ZOOM_scanset scan, const char *key)
2231 {
2232     return ZOOM_options_get (scan->options, key);
2233 }
2234
2235 ZOOM_API(void)
2236 ZOOM_scanset_option_set (ZOOM_scanset scan, const char *key,
2237                               const char *val)
2238 {
2239     ZOOM_options_set (scan->options, key, val);
2240 }
2241
2242 static Z_APDU *create_es_package (ZOOM_package p, int type)
2243 {
2244     const char *str;
2245     Z_APDU *apdu = zget_APDU(p->odr_out, Z_APDU_extendedServicesRequest);
2246     Z_ExtendedServicesRequest *req = apdu->u.extendedServicesRequest;
2247
2248     *req->function = Z_ExtendedServicesRequest_create;
2249
2250     str = ZOOM_options_get(p->options, "package-name");
2251     if (str && *str)
2252         req->packageName = nmem_strdup (p->odr_out->mem, str);
2253
2254     str = ZOOM_options_get(p->options, "user-id");
2255     if (str)
2256         req->userId = nmem_strdup (p->odr_out->mem, str);
2257
2258     req->packageType = yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2259                                               type);
2260
2261     str = ZOOM_options_get(p->options, "function");
2262     if (str)
2263     {
2264         if (!strcmp (str, "create"))
2265             *req->function = 1;
2266         if (!strcmp (str, "delete"))
2267             *req->function = 2;
2268         if (!strcmp (str, "modify"))
2269             *req->function = 3;
2270     }
2271     return apdu;
2272 }
2273
2274 static const char *ill_array_lookup (void *clientData, const char *idx)
2275 {
2276     ZOOM_package p = (ZOOM_package) clientData;
2277     return ZOOM_options_get (p->options, idx+4);
2278 }
2279
2280 static Z_External *encode_ill_request (ZOOM_package p)
2281 {
2282     ODR out = p->odr_out;
2283     ILL_Request *req;
2284     Z_External *r = 0;
2285     struct ill_get_ctl ctl;
2286
2287     ctl.odr = p->odr_out;
2288     ctl.clientData = p;
2289     ctl.f = ill_array_lookup;
2290
2291     req = ill_get_ILLRequest(&ctl, "ill", 0);
2292
2293     if (!ill_Request (out, &req, 0, 0))
2294     {
2295         int ill_request_size;
2296         char *ill_request_buf = odr_getbuf (out, &ill_request_size, 0);
2297         if (ill_request_buf)
2298             odr_setbuf (out, ill_request_buf, ill_request_size, 1);
2299         return 0;
2300     }
2301     else
2302     {
2303         oident oid;
2304         int illRequest_size = 0;
2305         char *illRequest_buf = odr_getbuf (out, &illRequest_size, 0);
2306
2307         oid.proto = PROTO_GENERAL;
2308         oid.oclass = CLASS_GENERAL;
2309         oid.value = VAL_ISO_ILL_1;
2310
2311         r = (Z_External *) odr_malloc (out, sizeof(*r));
2312         r->direct_reference = odr_oiddup(out,oid_getoidbyent(&oid));
2313         r->indirect_reference = 0;
2314         r->descriptor = 0;
2315         r->which = Z_External_single;
2316
2317         r->u.single_ASN1_type = (Odr_oct *)
2318             odr_malloc (out, sizeof(*r->u.single_ASN1_type));
2319         r->u.single_ASN1_type->buf = (unsigned char*)
2320             odr_malloc (out, illRequest_size);
2321         r->u.single_ASN1_type->len = illRequest_size;
2322         r->u.single_ASN1_type->size = illRequest_size;
2323         memcpy (r->u.single_ASN1_type->buf, illRequest_buf, illRequest_size);
2324     }
2325     return r;
2326 }
2327
2328 static Z_ItemOrder *encode_item_order(ZOOM_package p)
2329 {
2330     Z_ItemOrder *req = (Z_ItemOrder *) odr_malloc (p->odr_out, sizeof(*req));
2331     const char *str;
2332
2333     req->which=Z_IOItemOrder_esRequest;
2334     req->u.esRequest = (Z_IORequest *)
2335         odr_malloc(p->odr_out,sizeof(Z_IORequest));
2336
2337     /* to keep part ... */
2338     req->u.esRequest->toKeep = (Z_IOOriginPartToKeep *)
2339         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartToKeep));
2340     req->u.esRequest->toKeep->supplDescription = 0;
2341     req->u.esRequest->toKeep->contact = (Z_IOContact *)
2342         odr_malloc (p->odr_out, sizeof(*req->u.esRequest->toKeep->contact));
2343
2344     str = ZOOM_options_get(p->options, "contact-name");
2345     req->u.esRequest->toKeep->contact->name = str ?
2346         nmem_strdup (p->odr_out->mem, str) : 0;
2347
2348     str = ZOOM_options_get(p->options, "contact-phone");
2349     req->u.esRequest->toKeep->contact->phone = str ?
2350         nmem_strdup (p->odr_out->mem, str) : 0;
2351
2352     str = ZOOM_options_get(p->options, "contact-email");
2353     req->u.esRequest->toKeep->contact->email = str ?
2354         nmem_strdup (p->odr_out->mem, str) : 0;
2355
2356     req->u.esRequest->toKeep->addlBilling = 0;
2357
2358     /* not to keep part ... */
2359     req->u.esRequest->notToKeep = (Z_IOOriginPartNotToKeep *)
2360         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartNotToKeep));
2361
2362     str = ZOOM_options_get(p->options, "itemorder-setname");
2363     if (!str)
2364         str = "default";
2365
2366     if (!*str)
2367         req->u.esRequest->notToKeep->resultSetItem = 0;
2368     else
2369     {
2370         req->u.esRequest->notToKeep->resultSetItem = (Z_IOResultSetItem *)
2371            odr_malloc(p->odr_out, sizeof(Z_IOResultSetItem));
2372
2373         req->u.esRequest->notToKeep->resultSetItem->resultSetId =
2374            nmem_strdup (p->odr_out->mem, str);
2375         req->u.esRequest->notToKeep->resultSetItem->item =
2376             (int *) odr_malloc(p->odr_out, sizeof(int));
2377
2378         str = ZOOM_options_get(p->options, "itemorder-item");
2379         *req->u.esRequest->notToKeep->resultSetItem->item =
2380             (str ? atoi(str) : 1);
2381     }
2382     req->u.esRequest->notToKeep->itemRequest = encode_ill_request(p);
2383
2384     return req;
2385 }
2386
2387 Z_APDU *create_admin_package(ZOOM_package p, int type,
2388                              Z_ESAdminOriginPartToKeep **toKeepP,
2389                              Z_ESAdminOriginPartNotToKeep **notToKeepP)
2390 {
2391     Z_APDU *apdu = create_es_package (p, VAL_ADMINSERVICE);
2392     if (apdu)
2393     {
2394         Z_ESAdminOriginPartToKeep  *toKeep;
2395         Z_ESAdminOriginPartNotToKeep  *notToKeep;
2396         Z_External *r = (Z_External *) odr_malloc (p->odr_out, sizeof(*r));
2397         const char *first_db = "Default";
2398         int num_db;
2399         char **db = set_DatabaseNames(p->connection, p->options, &num_db);
2400         if (num_db > 0)
2401             first_db = db[0];
2402
2403         r->direct_reference =
2404             yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2405                                    VAL_ADMINSERVICE);
2406         r->descriptor = 0;
2407         r->indirect_reference = 0;
2408         r->which = Z_External_ESAdmin;
2409
2410         r->u.adminService = (Z_Admin *)
2411             odr_malloc(p->odr_out, sizeof(*r->u.adminService));
2412         r->u.adminService->which = Z_Admin_esRequest;
2413         r->u.adminService->u.esRequest = (Z_AdminEsRequest *)
2414             odr_malloc(p->odr_out, sizeof(*r->u.adminService->u.esRequest));
2415
2416         toKeep = r->u.adminService->u.esRequest->toKeep =
2417             (Z_ESAdminOriginPartToKeep *)
2418             odr_malloc(p->odr_out, sizeof(*r->u.adminService->u.esRequest->toKeep));
2419         toKeep->which=type;
2420         toKeep->databaseName = odr_strdup(p->odr_out, first_db);
2421         toKeep->u.create=odr_nullval();
2422         apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2423
2424         r->u.adminService->u.esRequest->notToKeep = notToKeep =
2425             (Z_ESAdminOriginPartNotToKeep *)
2426             odr_malloc(p->odr_out,
2427                        sizeof(*r->u.adminService->u.esRequest->notToKeep));
2428         notToKeep->which=Z_ESAdminOriginPartNotToKeep_recordsWillFollow;
2429         notToKeep->u.recordsWillFollow=odr_nullval();
2430         if (toKeepP)
2431             *toKeepP = toKeep;
2432         if (notToKeepP)
2433             *notToKeepP = notToKeep;
2434     }
2435     return apdu;
2436 }
2437
2438 static Z_APDU *create_update_package(ZOOM_package p)
2439 {
2440     Z_APDU *apdu = 0;
2441     const char *first_db = "Default";
2442     int num_db;
2443     char **db = set_DatabaseNames(p->connection, p->options, &num_db);
2444     const char *action = ZOOM_options_get(p->options, "action");
2445     const char *recordId = ZOOM_options_get(p->options, "recordId");
2446     const char *record_buf = ZOOM_options_get(p->options, "record");
2447     const char *syntax_str = ZOOM_options_get(p->options, "syntax");
2448     int syntax_oid = VAL_NONE;
2449     int action_no = -1;
2450
2451     if (syntax_str)
2452         syntax_oid = oid_getvalbyname(syntax_str);
2453     if (!record_buf)
2454     {
2455         record_buf = "void";
2456         syntax_oid = VAL_SUTRS;
2457     }
2458     if (syntax_oid != VAL_NONE)
2459         syntax_oid = VAL_TEXT_XML;
2460
2461     if (num_db > 0)
2462         first_db = db[0];
2463
2464     if (!action)
2465         action = "specialUpdate";
2466
2467     if (!strcmp(action, "recordInsert"))
2468         action_no = Z_IUOriginPartToKeep_recordInsert;
2469     else if (!strcmp(action, "recordReplace"))
2470         action_no = Z_IUOriginPartToKeep_recordReplace;
2471     else if (!strcmp(action, "recordDelete"))
2472         action_no = Z_IUOriginPartToKeep_recordDelete;
2473     else if (!strcmp(action, "elementUpdate"))
2474         action_no = Z_IUOriginPartToKeep_elementUpdate;
2475     else if (!strcmp(action, "specialUpdate"))
2476         action_no = Z_IUOriginPartToKeep_specialUpdate;
2477     else
2478         return 0;
2479
2480     apdu = create_es_package (p, VAL_DBUPDATE);
2481     if (apdu)
2482     {
2483         Z_IUOriginPartToKeep *toKeep;
2484         Z_IUSuppliedRecords *notToKeep;
2485         Z_External *r = (Z_External *)
2486             odr_malloc (p->odr_out, sizeof(*r));
2487
2488         apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2489
2490         r->direct_reference =
2491             yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2492                                    VAL_DBUPDATE);
2493         r->descriptor = 0;
2494         r->which = Z_External_update;
2495         r->indirect_reference = 0;
2496         r->u.update = (Z_IUUpdate *)
2497             odr_malloc(p->odr_out, sizeof(*r->u.update));
2498
2499         r->u.update->which = Z_IUUpdate_esRequest;
2500         r->u.update->u.esRequest = (Z_IUUpdateEsRequest *)
2501             odr_malloc(p->odr_out, sizeof(*r->u.update->u.esRequest));
2502         toKeep = r->u.update->u.esRequest->toKeep =
2503             (Z_IUOriginPartToKeep *)
2504             odr_malloc(p->odr_out, sizeof(*toKeep));
2505
2506         toKeep->databaseName = odr_strdup(p->odr_out, first_db);
2507         toKeep->schema = 0;
2508         toKeep->elementSetName = 0;
2509         toKeep->actionQualifier = 0;
2510         toKeep->action = odr_intdup(p->odr_out, action_no);
2511
2512         notToKeep = r->u.update->u.esRequest->notToKeep =
2513             (Z_IUSuppliedRecords *)
2514             odr_malloc(p->odr_out, sizeof(*notToKeep));
2515         notToKeep->num = 1;
2516         notToKeep->elements = (Z_IUSuppliedRecords_elem **)
2517             odr_malloc(p->odr_out, sizeof(*notToKeep->elements));
2518         notToKeep->elements[0] = (Z_IUSuppliedRecords_elem *)
2519             odr_malloc(p->odr_out, sizeof(**notToKeep->elements));
2520         notToKeep->elements[0]->which = Z_IUSuppliedRecords_elem_opaque;
2521         if (recordId)
2522         {
2523             notToKeep->elements[0]->u.opaque = (Odr_oct *)
2524                 odr_malloc (p->odr_out, sizeof(Odr_oct));
2525             notToKeep->elements[0]->u.opaque->size = strlen(recordId);
2526             notToKeep->elements[0]->u.opaque->len = strlen(recordId);
2527             notToKeep->elements[0]->u.opaque->buf =
2528                 odr_strdup(p->odr_out, recordId);
2529         }
2530         else
2531             notToKeep->elements[0]->u.opaque = 0;
2532         notToKeep->elements[0]->supplementalId = 0;
2533         notToKeep->elements[0]->correlationInfo = 0;
2534         notToKeep->elements[0]->record =
2535             z_ext_record(p->odr_out, syntax_oid,
2536                          record_buf, strlen(record_buf));
2537     }
2538     if (0 && apdu)
2539     {
2540        ODR print = odr_createmem(ODR_PRINT);
2541
2542        z_APDU(print, &apdu, 0, 0);
2543        odr_destroy(print);
2544     }
2545     return apdu;
2546 }
2547
2548 ZOOM_API(void)
2549     ZOOM_package_send (ZOOM_package p, const char *type)
2550 {
2551     Z_APDU *apdu = 0;
2552     ZOOM_connection c;
2553     if (!p)
2554         return;
2555     c = p->connection;
2556     odr_reset (p->odr_out);
2557     xfree (p->buf_out);
2558     p->buf_out = 0;
2559     if (!strcmp(type, "itemorder"))
2560     {
2561         apdu = create_es_package (p, VAL_ITEMORDER);
2562         if (apdu)
2563         {
2564             Z_External *r = (Z_External *) odr_malloc (p->odr_out, sizeof(*r));
2565
2566             r->direct_reference =
2567                 yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2568                                        VAL_ITEMORDER);
2569             r->descriptor = 0;
2570             r->which = Z_External_itemOrder;
2571             r->indirect_reference = 0;
2572             r->u.itemOrder = encode_item_order (p);
2573
2574             apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2575         }
2576     }
2577     if (!strcmp(type, "create"))  /* create database */
2578     {
2579         apdu = create_admin_package(p, Z_ESAdminOriginPartToKeep_create,
2580                                     0, 0);
2581     }
2582     if (!strcmp(type, "drop"))  /* drop database */
2583     {
2584         apdu = create_admin_package(p, Z_ESAdminOriginPartToKeep_drop,
2585                                     0, 0);
2586     }
2587     if (!strcmp(type, "update")) /* update record(s) */
2588     {
2589         apdu = create_update_package(p);
2590     }
2591     if (apdu)
2592     {
2593         if (encode_APDU(p->connection, apdu, p->odr_out) == 0)
2594         {
2595             char *buf;
2596
2597             ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_PACKAGE);
2598             task->u.package = p;
2599             buf = odr_getbuf(p->odr_out, &p->len_out, 0);
2600             p->buf_out = (char *) xmalloc (p->len_out);
2601             memcpy (p->buf_out, buf, p->len_out);
2602
2603             (p->refcount)++;
2604             if (!c->async)
2605             {
2606                 while (ZOOM_event (1, &c))
2607                     ;
2608             }
2609         }
2610     }
2611 }
2612
2613 ZOOM_API(ZOOM_package)
2614     ZOOM_connection_package (ZOOM_connection c, ZOOM_options options)
2615 {
2616     ZOOM_package p = (ZOOM_package) xmalloc (sizeof(*p));
2617
2618     p->connection = c;
2619     p->odr_out = odr_createmem (ODR_ENCODE);
2620     p->options = ZOOM_options_create_with_parent2 (options, c->options);
2621     p->refcount = 1;
2622     p->buf_out = 0;
2623     p->len_out = 0;
2624     return p;
2625 }
2626
2627 ZOOM_API(void)
2628     ZOOM_package_destroy(ZOOM_package p)
2629 {
2630     if (!p)
2631         return;
2632     (p->refcount)--;
2633     if (p->refcount == 0)
2634     {
2635         odr_destroy (p->odr_out);
2636         xfree (p->buf_out);
2637
2638         ZOOM_options_destroy (p->options);
2639         xfree (p);
2640     }
2641 }
2642
2643 ZOOM_API(const char *)
2644 ZOOM_package_option_get (ZOOM_package p, const char *key)
2645 {
2646     return ZOOM_options_get (p->options, key);
2647 }
2648
2649
2650 ZOOM_API(void)
2651 ZOOM_package_option_set (ZOOM_package p, const char *key,
2652                               const char *val)
2653 {
2654     ZOOM_options_set (p->options, key, val);
2655 }
2656
2657 static int ZOOM_connection_exec_task (ZOOM_connection c)
2658 {
2659     ZOOM_task task = c->tasks;
2660     zoom_ret ret = zoom_complete;
2661
2662     if (!task)
2663     {
2664         yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task task=<null>");
2665         return 0;
2666     }
2667     yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task type=%d run=%d",
2668              task->which, task->running);
2669     if (c->error != ZOOM_ERROR_NONE)
2670     {
2671         yaz_log (LOG_DEBUG, "remove tasks because of error = %d", c->error);
2672         ZOOM_connection_remove_tasks (c);
2673         return 0;
2674     }
2675     if (task->running)
2676     {
2677         yaz_log (LOG_DEBUG, "task already running");
2678         return 0;
2679     }
2680     task->running = 1;
2681     ret = zoom_complete;
2682     if (c->cs || task->which == ZOOM_TASK_CONNECT)
2683     {
2684         switch (task->which)
2685         {
2686         case ZOOM_TASK_SEARCH:
2687             if (c->proto == PROTO_HTTP)
2688                 ret = ZOOM_connection_srw_send_search(c);
2689             else
2690                 ret = ZOOM_connection_send_search(c);
2691             break;
2692         case ZOOM_TASK_RETRIEVE:
2693             if (c->proto == PROTO_HTTP)
2694                 ret = ZOOM_connection_srw_send_search(c);
2695             else
2696                 ret = send_present (c);
2697             break;
2698         case ZOOM_TASK_CONNECT:
2699             ret = do_connect(c);
2700             break;
2701         case ZOOM_TASK_SCAN:
2702             ret = send_scan(c);
2703             break;
2704         case ZOOM_TASK_PACKAGE:
2705             ret = send_package(c);
2706             break;
2707         }
2708     }
2709     else
2710     {
2711         yaz_log (LOG_DEBUG, "remove tasks because no connection exist");
2712         ZOOM_connection_remove_tasks (c);
2713     }
2714     if (ret == zoom_complete)
2715     {
2716         yaz_log (LOG_DEBUG, "task removed (complete)");
2717         ZOOM_connection_remove_task (c);
2718         return 0;
2719     }
2720     yaz_log (LOG_DEBUG, "task pending");
2721     return 1;
2722 }
2723
2724 static zoom_ret send_sort_present (ZOOM_connection c)
2725 {
2726     zoom_ret r = send_sort (c);
2727     if (r == zoom_complete)
2728         r = send_present (c);
2729     return r;
2730 }
2731
2732 static int es_response (ZOOM_connection c,
2733                         Z_ExtendedServicesResponse *res)
2734 {
2735     if (!c->tasks || c->tasks->which != ZOOM_TASK_PACKAGE)
2736         return 0;
2737     if (res->diagnostics && res->num_diagnostics > 0)
2738         response_diag(c, res->diagnostics[0]);
2739     if (res->taskPackage &&
2740         res->taskPackage->which == Z_External_extendedService)
2741     {
2742         Z_TaskPackage *taskPackage = res->taskPackage->u.extendedService;
2743         Odr_oct *id = taskPackage->targetReference;
2744
2745         if (id)
2746             ZOOM_options_setl (c->tasks->u.package->options,
2747                                "targetReference", (char*) id->buf, id->len);
2748     }
2749     return 1;
2750 }
2751
2752
2753 static void handle_apdu (ZOOM_connection c, Z_APDU *apdu)
2754 {
2755     Z_InitResponse *initrs;
2756
2757     c->mask = 0;
2758     yaz_log (LOG_DEBUG, "recv APDU type=%d", apdu->which);
2759     switch(apdu->which)
2760     {
2761     case Z_APDU_initResponse:
2762         initrs = apdu->u.initResponse;
2763         ZOOM_connection_option_set(c, "serverImplementationId",
2764                                    initrs->implementationId ?
2765                                    initrs->implementationId : "");
2766         ZOOM_connection_option_set(c, "serverImplementationName",
2767                                    initrs->implementationName ?
2768                                    initrs->implementationName : "");
2769         ZOOM_connection_option_set(c, "serverImplementationVersion",
2770                                    initrs->implementationVersion ?
2771                                    initrs->implementationVersion : "");
2772         /* Set the three old options too, for old applications */
2773         ZOOM_connection_option_set(c, "targetImplementationId",
2774                                    initrs->implementationId ?
2775                                    initrs->implementationId : "");
2776         ZOOM_connection_option_set(c, "targetImplementationName",
2777                                    initrs->implementationName ?
2778                                    initrs->implementationName : "");
2779         ZOOM_connection_option_set(c, "targetImplementationVersion",
2780                                    initrs->implementationVersion ?
2781                                    initrs->implementationVersion : "");
2782         if (!*initrs->result)
2783         {
2784             set_ZOOM_error(c, ZOOM_ERROR_INIT, 0);
2785         }
2786         else
2787         {
2788             char *cookie =
2789                 yaz_oi_get_string_oidval (&apdu->u.initResponse->otherInfo,
2790                                           VAL_COOKIE, 1, 0);
2791             xfree (c->cookie_in);
2792             c->cookie_in = 0;
2793             if (cookie)
2794                 c->cookie_in = xstrdup(cookie);
2795             if (ODR_MASK_GET(initrs->options, Z_Options_namedResultSets) &&
2796                 ODR_MASK_GET(initrs->protocolVersion, Z_ProtocolVersion_3))
2797                 c->support_named_resultsets = 1;
2798             if (c->tasks)
2799             {
2800                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2801                 ZOOM_connection_remove_task (c);
2802             }
2803             ZOOM_connection_exec_task (c);
2804         }
2805         if (ODR_MASK_GET(initrs->options, Z_Options_negotiationModel))
2806         {
2807             NMEM tmpmem = nmem_create();
2808             Z_CharSetandLanguageNegotiation *p =
2809                 yaz_get_charneg_record(initrs->otherInfo);
2810
2811             if (p)
2812             {
2813                 char *charset=NULL, *lang=NULL;
2814                 int sel;
2815
2816                 yaz_get_response_charneg(tmpmem, p, &charset, &lang, &sel);
2817                 yaz_log(LOG_DEBUG, "Target accepted: charset %s, "
2818                         "language %s, select %d",
2819                         charset ? charset : "none", lang ? lang : "none", sel);
2820                 if (charset)
2821                     ZOOM_connection_option_set (c, "negotiation-charset",
2822                                                 charset);
2823                 if (lang)
2824                     ZOOM_connection_option_set (c, "negotiation-lang",
2825                                                 lang);
2826                 nmem_destroy(tmpmem);
2827             }
2828         }
2829         break;
2830     case Z_APDU_searchResponse:
2831         handle_search_response (c, apdu->u.searchResponse);
2832         if (send_sort_present (c) == zoom_complete)
2833             ZOOM_connection_remove_task (c);
2834         break;
2835     case Z_APDU_presentResponse:
2836         handle_present_response (c, apdu->u.presentResponse);
2837         if (send_present (c) == zoom_complete)
2838             ZOOM_connection_remove_task (c);
2839         break;
2840     case Z_APDU_sortResponse:
2841         sort_response (c, apdu->u.sortResponse);
2842         if (send_present (c) == zoom_complete)
2843             ZOOM_connection_remove_task (c);
2844         break;
2845     case Z_APDU_scanResponse:
2846         scan_response (c, apdu->u.scanResponse);
2847         ZOOM_connection_remove_task (c);
2848         break;
2849     case Z_APDU_extendedServicesResponse:
2850         es_response (c, apdu->u.extendedServicesResponse);
2851         ZOOM_connection_remove_task (c);
2852         break;
2853     case Z_APDU_close:
2854         if (c->reconnect_ok)
2855         {
2856             do_close(c);
2857             c->tasks->running = 0;
2858             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2859         }
2860         else
2861         {
2862             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2863             do_close(c);
2864         }
2865         break;
2866     default:
2867         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2868         do_close(c);
2869     }
2870 }
2871
2872 #if HAVE_XML2
2873 static void handle_srw_response(ZOOM_connection c,
2874                                 Z_SRW_searchRetrieveResponse *res)
2875 {
2876     ZOOM_resultset resultset = 0;
2877     int i;
2878     NMEM nmem;
2879     ZOOM_Event event;
2880
2881     if (!c->tasks)
2882         return;
2883
2884     if (c->tasks->which == ZOOM_TASK_SEARCH)
2885         resultset = c->tasks->u.search.resultset;
2886     else if (c->tasks->which == ZOOM_TASK_RETRIEVE)
2887         resultset = c->tasks->u.retrieve.resultset;
2888     else
2889         return ;
2890
2891     event = ZOOM_Event_create(ZOOM_EVENT_RECV_SEARCH);
2892     ZOOM_connection_put_event(c, event);
2893
2894     resultset->size = 0;
2895
2896     yaz_log(LOG_DEBUG, "got SRW response OK");
2897
2898     if (res->numberOfRecords)
2899         resultset->size = *res->numberOfRecords;
2900
2901     for (i = 0; i<res->num_records; i++)
2902     {
2903         int pos;
2904
2905         Z_NamePlusRecord *npr = (Z_NamePlusRecord *)
2906             odr_malloc(c->odr_in, sizeof(Z_NamePlusRecord));
2907
2908         if (res->records[i].recordPosition &&
2909             *res->records[i].recordPosition > 0)
2910             pos = *res->records[i].recordPosition - 1;
2911         else
2912             pos = resultset->start + i;
2913
2914         npr->databaseName = 0;
2915         npr->which = Z_NamePlusRecord_databaseRecord;
2916         npr->u.databaseRecord = (Z_External *)
2917             odr_malloc(c->odr_in, sizeof(Z_External));
2918         npr->u.databaseRecord->descriptor = 0;
2919         npr->u.databaseRecord->direct_reference =
2920             yaz_oidval_to_z3950oid(c->odr_in, CLASS_RECSYN, VAL_TEXT_XML);
2921         npr->u.databaseRecord->which = Z_External_octet;
2922         npr->u.databaseRecord->u.octet_aligned = (Odr_oct *)
2923             odr_malloc(c->odr_in, sizeof(Odr_oct));
2924         npr->u.databaseRecord->u.octet_aligned->buf =
2925             res->records[i].recordData_buf;
2926         npr->u.databaseRecord->u.octet_aligned->len =
2927             npr->u.databaseRecord->u.octet_aligned->size =
2928             res->records[i].recordData_len;
2929         record_cache_add (resultset, npr, pos);
2930     }
2931     if (res->num_diagnostics > 0)
2932     {
2933         set_dset_error(c, *res->diagnostics[0].code, "SRW",
2934                        res->diagnostics[0].details, 0);
2935     }
2936     nmem = odr_extract_mem(c->odr_in);
2937     nmem_transfer(resultset->odr->mem, nmem);
2938     nmem_destroy(nmem);
2939 }
2940 #endif
2941
2942 #if HAVE_XML2
2943 static void handle_http(ZOOM_connection c, Z_HTTP_Response *hres)
2944 {
2945     int ret = -1;
2946     const char *content_type = z_HTTP_header_lookup(hres->headers,
2947                                                     "Content-Type");
2948     const char *connection_head = z_HTTP_header_lookup(hres->headers,
2949                                                        "Connection");
2950     c->mask = 0;
2951     yaz_log (LOG_DEBUG, "handle_http");
2952
2953     if (content_type && !yaz_strcmp_del("text/xml", content_type, "; "))
2954     {
2955         Z_SOAP *soap_package = 0;
2956         ODR o = odr_createmem(ODR_DECODE);
2957         Z_SOAP_Handler soap_handlers[2] = {
2958             {"http://www.loc.gov/zing/srw/v1.0/", 0,
2959              (Z_SOAP_fun) yaz_srw_codec},
2960             {0, 0, 0}
2961         };
2962         ret = z_soap_codec(o, &soap_package,
2963                            &hres->content_buf, &hres->content_len,
2964                            soap_handlers);
2965         if (!ret && soap_package->which == Z_SOAP_generic &&
2966             soap_package->u.generic->no == 0)
2967         {
2968             Z_SRW_PDU *sr = soap_package->u.generic->p;
2969             if (sr->which == Z_SRW_searchRetrieve_response)
2970                 handle_srw_response(c, sr->u.response);
2971             else
2972                 ret = -1;
2973         }
2974         else if (!ret && (soap_package->which == Z_SOAP_fault
2975                           || soap_package->which == Z_SOAP_error))
2976         {
2977             set_HTTP_error(c, hres->code,
2978                            soap_package->u.fault->fault_code,
2979                            soap_package->u.fault->fault_string);
2980         }
2981         else
2982             ret = -1;
2983         odr_destroy(o);
2984     }
2985     if (ret)
2986     {
2987         if (hres->code != 200)
2988             set_HTTP_error(c, hres->code, 0, 0);
2989         else
2990             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2991         do_close (c);
2992     }
2993     ZOOM_connection_remove_task(c);
2994     if (!strcmp(hres->version, "1.0"))
2995     {
2996         /* HTTP 1.0: only if Keep-Alive we stay alive.. */
2997         if (!connection_head || strcmp(connection_head, "Keep-Alive"))
2998             do_close(c);
2999     }
3000     else
3001     {
3002         /* HTTP 1.1: only if no close we stay alive .. */
3003         if (connection_head && !strcmp(connection_head, "close"))
3004             do_close(c);
3005     }
3006 }
3007 #endif
3008
3009 static int do_read (ZOOM_connection c)
3010 {
3011     int r, more;
3012     ZOOM_Event event;
3013
3014     event = ZOOM_Event_create (ZOOM_EVENT_RECV_DATA);
3015     ZOOM_connection_put_event (c, event);
3016
3017     r = cs_get (c->cs, &c->buf_in, &c->len_in);
3018     more = cs_more(c->cs);
3019     yaz_log (LOG_DEBUG, "do_read len=%d more=%d", r, more);
3020     if (r == 1)
3021         return 0;
3022     if (r <= 0)
3023     {
3024         if (c->reconnect_ok)
3025         {
3026             do_close (c);
3027             c->reconnect_ok = 0;
3028             yaz_log (LOG_DEBUG, "reconnect read");
3029             c->tasks->running = 0;
3030             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
3031         }
3032         else
3033         {
3034             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
3035             do_close (c);
3036         }
3037     }
3038     else
3039     {
3040         Z_GDU *gdu;
3041         ZOOM_Event event;
3042
3043         odr_reset (c->odr_in);
3044         odr_setbuf (c->odr_in, c->buf_in, r, 0);
3045         event = ZOOM_Event_create (ZOOM_EVENT_RECV_APDU);
3046         ZOOM_connection_put_event (c, event);
3047
3048         if (!z_GDU (c->odr_in, &gdu, 0, 0))
3049         {
3050             int x;
3051             int err = odr_geterrorx(c->odr_in, &x);
3052             char msg[60];
3053             const char *element = odr_getelement(c->odr_in);
3054             sprintf (msg, "ODR code %d:%d element=%-20s",
3055                      err, x, element ? element : "<unknown>");
3056             set_ZOOM_error(c, ZOOM_ERROR_DECODE, msg);
3057             do_close (c);
3058         }
3059         else if (gdu->which == Z_GDU_Z3950)
3060             handle_apdu (c, gdu->u.z3950);
3061         else if (gdu->which == Z_GDU_HTTP_Response)
3062         {
3063 #if HAVE_XML2
3064             handle_http (c, gdu->u.HTTP_Response);
3065 #else
3066             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
3067             do_close (c);
3068 #endif
3069         }
3070         c->reconnect_ok = 0;
3071     }
3072     return 1;
3073 }
3074
3075 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out)
3076 {
3077     int r;
3078     ZOOM_Event event;
3079
3080     event = ZOOM_Event_create(ZOOM_EVENT_SEND_DATA);
3081     ZOOM_connection_put_event (c, event);
3082
3083     yaz_log (LOG_DEBUG, "do_write_ex len=%d", len_out);
3084     if ((r=cs_put (c->cs, buf_out, len_out)) < 0)
3085     {
3086         if (c->reconnect_ok)
3087         {
3088             do_close (c);
3089             c->reconnect_ok = 0;
3090             yaz_log (LOG_DEBUG, "reconnect write");
3091             c->tasks->running = 0;
3092             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
3093             return zoom_pending;
3094         }
3095         if (c->state == STATE_CONNECTING)
3096             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
3097         else
3098             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
3099         do_close (c);
3100         return zoom_complete;
3101     }
3102     else if (r == 1)
3103     {
3104         c->mask = ZOOM_SELECT_EXCEPT;
3105         if (c->cs->io_pending & CS_WANT_WRITE)
3106             c->mask += ZOOM_SELECT_WRITE;
3107         if (c->cs->io_pending & CS_WANT_READ)
3108             c->mask += ZOOM_SELECT_READ;
3109         yaz_log (LOG_DEBUG, "do_write_ex 1 mask=%d", c->mask);
3110     }
3111     else
3112     {
3113         c->mask = ZOOM_SELECT_READ|ZOOM_SELECT_EXCEPT;
3114         yaz_log (LOG_DEBUG, "do_write_ex 2 mask=%d", c->mask);
3115     }
3116     return zoom_pending;
3117 }
3118
3119 static zoom_ret do_write(ZOOM_connection c)
3120 {
3121     return do_write_ex (c, c->buf_out, c->len_out);
3122 }
3123
3124
3125 ZOOM_API(const char *)
3126 ZOOM_connection_option_get (ZOOM_connection c, const char *key)
3127 {
3128     return ZOOM_options_get (c->options, key);
3129 }
3130
3131 ZOOM_API(void)
3132 ZOOM_connection_option_set (ZOOM_connection c, const char *key,
3133                                   const char *val)
3134 {
3135     ZOOM_options_set (c->options, key, val);
3136 }
3137
3138 ZOOM_API(const char *)
3139 ZOOM_resultset_option_get (ZOOM_resultset r, const char *key)
3140 {
3141     return ZOOM_options_get (r->options, key);
3142 }
3143
3144 ZOOM_API(void)
3145 ZOOM_resultset_option_set (ZOOM_resultset r, const char *key,
3146                                   const char *val)
3147 {
3148     ZOOM_options_set (r->options, key, val);
3149 }
3150
3151
3152 ZOOM_API(int)
3153 ZOOM_connection_errcode (ZOOM_connection c)
3154 {
3155     return ZOOM_connection_error (c, 0, 0);
3156 }
3157
3158 ZOOM_API(const char *)
3159 ZOOM_connection_errmsg (ZOOM_connection c)
3160 {
3161     const char *msg;
3162     ZOOM_connection_error (c, &msg, 0);
3163     return msg;
3164 }
3165
3166 ZOOM_API(const char *)
3167 ZOOM_connection_addinfo (ZOOM_connection c)
3168 {
3169     const char *addinfo;
3170     ZOOM_connection_error (c, 0, &addinfo);
3171     return addinfo;
3172 }
3173
3174 ZOOM_API(const char *)
3175 ZOOM_diag_str (int error)
3176 {
3177     switch (error)
3178     {
3179     case ZOOM_ERROR_NONE:
3180         return "No error";
3181     case ZOOM_ERROR_CONNECT:
3182         return "Connect failed";
3183     case ZOOM_ERROR_MEMORY:
3184         return "Out of memory";
3185     case ZOOM_ERROR_ENCODE:
3186         return "Encoding failed";
3187     case ZOOM_ERROR_DECODE:
3188         return "Decoding failed";
3189     case ZOOM_ERROR_CONNECTION_LOST:
3190         return "Connection lost";
3191     case ZOOM_ERROR_INIT:
3192         return "Init rejected";
3193     case ZOOM_ERROR_INTERNAL:
3194         return "Internal failure";
3195     case ZOOM_ERROR_TIMEOUT:
3196         return "Timeout";
3197     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
3198         return "Unsupported protocol";
3199     case ZOOM_ERROR_UNSUPPORTED_QUERY:
3200         return "Unsupported query type";
3201     default:
3202         return diagbib1_str (error);
3203     }
3204 }
3205
3206 ZOOM_API(int)
3207 ZOOM_connection_error_x (ZOOM_connection c, const char **cp,
3208                          const char **addinfo, const char **diagset)
3209 {
3210     int error = c->error;
3211     if (cp)
3212     {
3213         if (!c->diagset || !strcmp(c->diagset, "ZOOM"))
3214             *cp = ZOOM_diag_str(error);
3215         else if (!strcmp(c->diagset, "HTTP"))
3216             *cp = z_HTTP_errmsg(c->error);
3217         else if (!strcmp(c->diagset, "Bib-1"))
3218             *cp = ZOOM_diag_str(error);
3219         else if (!strcmp(c->diagset, "SRW"))
3220             *cp = yaz_diag_srw_str(c->error);
3221         else
3222             *cp = "Unknown error and diagnostic set";
3223     }
3224     if (addinfo)
3225         *addinfo = c->addinfo ? c->addinfo : "";
3226     if (diagset)
3227         *diagset = c->diagset ? c->diagset : "";
3228     return c->error;
3229 }
3230
3231 ZOOM_API(int)
3232 ZOOM_connection_error (ZOOM_connection c, const char **cp,
3233                        const char **addinfo)
3234 {
3235     return ZOOM_connection_error_x(c, cp, addinfo, 0);
3236 }
3237
3238 static int ZOOM_connection_do_io(ZOOM_connection c, int mask)
3239 {
3240     ZOOM_Event event = 0;
3241     int r = cs_look(c->cs);
3242     yaz_log (LOG_DEBUG, "ZOOM_connection_do_io c=%p mask=%d cs_look=%d",
3243              c, mask, r);
3244
3245     if (r == CS_NONE)
3246     {
3247         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
3248         set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
3249         do_close (c);
3250         ZOOM_connection_put_event (c, event);
3251     }
3252     else if (r == CS_CONNECT)
3253     {
3254         int ret;
3255         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
3256
3257         ret = cs_rcvconnect (c->cs);
3258         yaz_log (LOG_DEBUG, "cs_rcvconnect returned %d", ret);
3259         if (ret == 1)
3260         {
3261             c->mask = ZOOM_SELECT_EXCEPT;
3262             if (c->cs->io_pending & CS_WANT_WRITE)
3263                 c->mask += ZOOM_SELECT_WRITE;
3264             if (c->cs->io_pending & CS_WANT_READ)
3265                 c->mask += ZOOM_SELECT_READ;
3266             ZOOM_connection_put_event (c, event);
3267         }
3268         else if (ret == 0)
3269         {
3270             ZOOM_connection_put_event (c, event);
3271             if (c->proto == PROTO_Z3950)
3272                 ZOOM_connection_send_init(c);
3273             else
3274             {
3275                 /* no init request for SRW .. */
3276                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
3277                 ZOOM_connection_remove_task (c);
3278                 c->mask = 0;
3279                 ZOOM_connection_exec_task (c);
3280             }
3281             c->state = STATE_ESTABLISHED;
3282         }
3283         else
3284         {
3285             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
3286             do_close (c);
3287             ZOOM_connection_put_event (c, event);
3288         }
3289     }
3290     else
3291     {
3292         if (mask & ZOOM_SELECT_READ)
3293             do_read (c);
3294         if (c->cs && (mask & ZOOM_SELECT_WRITE))
3295             do_write (c);
3296     }
3297     return 1;
3298 }
3299
3300 ZOOM_API(int)
3301 ZOOM_connection_last_event(ZOOM_connection cs)
3302 {
3303     if (!cs)
3304         return ZOOM_EVENT_NONE;
3305     return cs->last_event;
3306 }
3307
3308 ZOOM_API(int)
3309 ZOOM_event (int no, ZOOM_connection *cs)
3310 {
3311     int timeout = 5000;
3312 #if HAVE_SYS_POLL_H
3313     struct pollfd pollfds[1024];
3314     ZOOM_connection poll_cs[1024];
3315 #else
3316     struct timeval tv;
3317     fd_set input, output, except;
3318 #endif
3319     int i, r, nfds;
3320     int max_fd = 0;
3321
3322     for (i = 0; i<no; i++)
3323     {
3324         ZOOM_connection c = cs[i];
3325         ZOOM_Event event;
3326         if (c && (event = ZOOM_connection_get_event(c)))
3327         {
3328             ZOOM_Event_destroy (event);
3329             return i+1;
3330         }
3331     }
3332     for (i = 0; i<no; i++)
3333     {
3334         ZOOM_connection c = cs[i];
3335         ZOOM_Event event;
3336         if (c && ZOOM_connection_exec_task (c))
3337         {
3338             if ((event = ZOOM_connection_get_event(c)))
3339             {
3340                 ZOOM_Event_destroy (event);
3341                 return i+1;
3342             }
3343         }
3344     }
3345 #if HAVE_SYS_POLL_H
3346
3347 #else
3348     FD_ZERO (&input);
3349     FD_ZERO (&output);
3350     FD_ZERO (&except);
3351 #endif
3352     nfds = 0;
3353     for (i = 0; i<no; i++)
3354     {
3355         ZOOM_connection c = cs[i];
3356         int fd, mask;
3357         int this_timeout;
3358
3359         if (!c)
3360             continue;
3361         fd = z3950_connection_socket(c);
3362         mask = z3950_connection_mask(c);
3363
3364         if (fd == -1)
3365             continue;
3366         if (max_fd < fd)
3367             max_fd = fd;
3368
3369         this_timeout = ZOOM_options_get_int (c->options, "timeout", -1);
3370         if (this_timeout != -1 && this_timeout < timeout)
3371             timeout = this_timeout;
3372 #if HAVE_SYS_POLL_H
3373         if (mask)
3374         {
3375             short poll_events = 0;
3376
3377             if (mask & ZOOM_SELECT_READ)
3378                 poll_events += POLLIN;
3379             if (mask & ZOOM_SELECT_WRITE)
3380                 poll_events += POLLOUT;
3381             if (mask & ZOOM_SELECT_EXCEPT)
3382                 poll_events += POLLERR;
3383             pollfds[nfds].fd = fd;
3384             pollfds[nfds].events = poll_events;
3385             pollfds[nfds].revents = 0;
3386             poll_cs[nfds] = c;
3387             nfds++;
3388         }
3389 #else
3390         if (mask & ZOOM_SELECT_READ)
3391         {
3392             FD_SET (fd, &input);
3393             nfds++;
3394         }
3395         if (mask & ZOOM_SELECT_WRITE)
3396         {
3397             FD_SET (fd, &output);
3398             nfds++;
3399         }
3400         if (mask & ZOOM_SELECT_EXCEPT)
3401         {
3402             FD_SET (fd, &except);
3403             nfds++;
3404         }
3405 #endif
3406     }
3407     if (timeout >= 5000)
3408         timeout = 30;
3409
3410     if (!nfds)
3411         return 0;
3412
3413 #if HAVE_SYS_POLL_H
3414     r = poll (pollfds, nfds, timeout * 1000);
3415     for (i = 0; i<nfds; i++)
3416     {
3417         ZOOM_connection c = poll_cs[i];
3418         if (r && c->mask)
3419         {
3420             int mask = 0;
3421             if (pollfds[i].revents & POLLIN)
3422                 mask += ZOOM_SELECT_READ;
3423             if (pollfds[i].revents & POLLOUT)
3424                 mask += ZOOM_SELECT_WRITE;
3425             if (pollfds[i].revents & POLLERR)
3426                 mask += ZOOM_SELECT_EXCEPT;
3427             if (mask)
3428                 ZOOM_connection_do_io(c, mask);
3429         }
3430         else if (r == 0 && c->mask)
3431         {
3432             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
3433             /* timeout and this connection was waiting */
3434             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
3435             do_close (c);
3436             ZOOM_connection_put_event(c, event);
3437         }
3438     }
3439 #else
3440     tv.tv_sec = timeout;
3441     tv.tv_usec = 0;
3442     yaz_log (LOG_DEBUG, "select start");
3443     r = select (max_fd+1, &input, &output, &except, &tv);
3444     yaz_log (LOG_DEBUG, "select stop, returned r=%d", r);
3445     for (i = 0; i<no; i++)
3446     {
3447         ZOOM_connection c = cs[i];
3448         int fd, mask;
3449
3450         if (!c)
3451             continue;
3452         fd = z3950_connection_socket(c);
3453         mask = 0;
3454         if (r && c->mask)
3455         {
3456             /* no timeout and real socket */
3457             if (FD_ISSET(fd, &input))
3458                 mask += ZOOM_SELECT_READ;
3459             if (FD_ISSET(fd, &output))
3460                 mask += ZOOM_SELECT_WRITE;
3461             if (FD_ISSET(fd, &except))
3462                 mask += ZOOM_SELECT_EXCEPT;
3463             if (mask)
3464                 ZOOM_connection_do_io(c, mask);
3465         }
3466         if (r == 0 && c->mask)
3467         {
3468             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
3469             /* timeout and this connection was waiting */
3470             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
3471             do_close (c);
3472             yaz_log (LOG_DEBUG, "timeout");
3473             ZOOM_connection_put_event(c, event);
3474         }
3475     }
3476 #endif
3477     for (i = 0; i<no; i++)
3478     {
3479         ZOOM_connection c = cs[i];
3480         ZOOM_Event event;
3481         if (c && (event = ZOOM_connection_get_event(c)))
3482         {
3483             ZOOM_Event_destroy (event);
3484             return i+1;
3485         }
3486     }
3487     return 0;
3488 }