zutil/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 1.19 2003-02-14 19:10:00 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/xmalloc.h>
  14 #include <yaz/otherinfo.h>
  15 #include <yaz/log.h>
  16 #include <yaz/pquery.h>
  17 #include <yaz/marcdisp.h>
  18 #include <yaz/diagbib1.h>
  19 #include <yaz/charneg.h>
  20 #include <yaz/ill.h>
  21 #include <yaz/srw.h>
  22
  23 #if HAVE_SYS_POLL_H
  24 #include <sys/poll.h>
  25 #endif
  26
  27 typedef enum {
  28     zoom_pending,
  29     zoom_complete
  30 } zoom_ret;
  31
  32 static zoom_ret ZOOM_connection_send_init (ZOOM_connection c);
  33 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out);
  34
  35 static ZOOM_Event ZOOM_Event_create (int kind)
  36 {
  37     ZOOM_Event event = (ZOOM_Event) xmalloc (sizeof(*event));
  38     event->kind = kind;
  39     event->next = 0;
  40     event->prev = 0;
  41     return event;
  42 }
  43
  44 static void ZOOM_Event_destroy (ZOOM_Event event)
  45 {
  46     xfree (event);
  47 }
  48
  49 static void ZOOM_connection_put_event (ZOOM_connection c, ZOOM_Event event)
  50 {
  51     if (c->m_queue_back)
  52     {
  53         c->m_queue_back->prev = event;
  54         assert (c->m_queue_front);
  55     }
  56     else
  57     {
  58         assert (!c->m_queue_front);
  59         c->m_queue_front = event;
  60     }
  61     event->next = c->m_queue_back;
  62     event->prev = 0;
  63     c->m_queue_back = event;
  64 }
  65
  66 static ZOOM_Event ZOOM_connection_get_event(ZOOM_connection c)
  67 {
  68     ZOOM_Event event = c->m_queue_front;
  69     if (!event)
  70         return 0;
  71     assert (c->m_queue_back);
  72     c->m_queue_front = event->prev;
  73     if (c->m_queue_front)
  74     {
  75         assert (c->m_queue_back);
  76         c->m_queue_front->next = 0;
  77     }
  78     else
  79         c->m_queue_back = 0;
  80     c->last_event = event->kind;
  81     return event;
  82 }
  83
  84 static void set_bib1_error (ZOOM_connection c, int error)
  85 {
  86     xfree (c->addinfo);
  87     c->addinfo = 0;
  88     c->error = error;
  89     c->diagset = "Bib-1";
  90 }
  91
  92 static void set_ZOOM_error (ZOOM_connection c, int error,
  93                             const char *addinfo)
  94 {
  95     xfree (c->addinfo);
  96     c->addinfo = 0;
  97     c->error = error;
  98     c->diagset = "ZOOM";
  99     if (addinfo)
 100         c->addinfo = xstrdup(addinfo);
 101 }
 102
 103 static void clear_error (ZOOM_connection c)
 104 {
 105
 106     switch (c->error)
 107     {
 108     case ZOOM_ERROR_CONNECT:
 109     case ZOOM_ERROR_MEMORY:
 110     case ZOOM_ERROR_DECODE:
 111     case ZOOM_ERROR_CONNECTION_LOST:
 112     case ZOOM_ERROR_INIT:
 113     case ZOOM_ERROR_INTERNAL:
 114     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
 115         break;
 116     default:
 117         set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 118     }
 119 }
 120
 121 ZOOM_task ZOOM_connection_add_task (ZOOM_connection c, int which)
 122 {
 123     ZOOM_task *taskp = &c->tasks;
 124     while (*taskp)
 125         taskp = &(*taskp)->next;
 126     *taskp = (ZOOM_task) xmalloc (sizeof(**taskp));
 127     (*taskp)->running = 0;
 128     (*taskp)->which = which;
 129     (*taskp)->next = 0;
 130     clear_error (c);
 131     return *taskp;
 132 }
 133
 134 ZOOM_task ZOOM_connection_insert_task (ZOOM_connection c, int which)
 135 {
 136     ZOOM_task task = (ZOOM_task) xmalloc (sizeof(*task));
 137
 138     task->next = c->tasks;
 139     c->tasks = task;
 140
 141     task->running = 0;
 142     task->which = which;
 143     clear_error (c);
 144     return task;
 145 }
 146
 147 void ZOOM_connection_remove_task (ZOOM_connection c)
 148 {
 149     ZOOM_task task = c->tasks;
 150
 151     if (task)
 152     {
 153         c->tasks = task->next;
 154         switch (task->which)
 155         {
 156         case ZOOM_TASK_SEARCH:
 157             ZOOM_resultset_destroy (task->u.search.resultset);
 158             break;
 159         case ZOOM_TASK_RETRIEVE:
 160             ZOOM_resultset_destroy (task->u.retrieve.resultset);
 161             break;
 162         case ZOOM_TASK_CONNECT:
 163             break;
 164         case ZOOM_TASK_SCAN:
 165             ZOOM_scanset_destroy (task->u.scan.scan);
 166             break;
 167         case ZOOM_TASK_PACKAGE:
 168             ZOOM_package_destroy (task->u.package);
 169             break;
 170         default:
 171             assert (0);
 172         }
 173         xfree (task);
 174     }
 175 }
 176
 177 static int ZOOM_connection_exec_task (ZOOM_connection c);
 178
 179 void ZOOM_connection_remove_tasks (ZOOM_connection c)
 180 {
 181     while (c->tasks)
 182         ZOOM_connection_remove_task(c);
 183 }
 184
 185 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos);
 186
 187 ZOOM_API(ZOOM_connection)
 188 ZOOM_connection_create (ZOOM_options options)
 189 {
 190     ZOOM_connection c = (ZOOM_connection) xmalloc (sizeof(*c));
 191
 192     c->proto = PROTO_Z3950;
 193     c->cs = 0;
 194     c->mask = 0;
 195     c->reconnect_ok = 0;
 196     c->state = STATE_IDLE;
 197     c->addinfo = 0;
 198     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 199     c->buf_in = 0;
 200     c->len_in = 0;
 201     c->buf_out = 0;
 202     c->len_out = 0;
 203     c->resultsets = 0;
 204
 205     c->options = ZOOM_options_create_with_parent(options);
 206
 207     c->host_port = 0;
 208     c->path = 0;
 209     c->proxy = 0;
 210
 211     c->charset = c->lang = 0;
 212
 213     c->cookie_out = 0;
 214     c->cookie_in = 0;
 215     c->client_IP = 0;
 216     c->tasks = 0;
 217
 218     c->odr_in = odr_createmem (ODR_DECODE);
 219     c->odr_out = odr_createmem (ODR_ENCODE);
 220
 221     c->async = 0;
 222     c->support_named_resultsets = 0;
 223     c->last_event = ZOOM_EVENT_NONE;
 224
 225     c->m_queue_front = 0;
 226     c->m_queue_back = 0;
 227     return c;
 228 }
 229
 230 /* set database names. Take local databases (if set); otherwise
 231    take databases given in ZURL (if set); otherwise use Default */
 232 static char **set_DatabaseNames (ZOOM_connection con, ZOOM_options options,
 233                                  int *num)
 234 {
 235     char **databaseNames;
 236     const char *c;
 237     int no = 2;
 238     const char *cp = ZOOM_options_get (options, "databaseName");
 239
 240     if (!cp || !*cp)
 241     {
 242         if (strncmp (con->host_port, "unix:", 5) == 0)
 243             cp = strchr (con->host_port+5, ':');
 244         else
 245             cp = strchr (con->host_port, '/');
 246         if (cp)
 247             cp++;
 248     }
 249     if (cp)
 250     {
 251         c = cp;
 252         while ((c = strchr(c, '+')))
 253         {
 254             c++;
 255             no++;
 256         }
 257     }
 258     else
 259         cp = "Default";
 260     databaseNames = (char**)
 261         odr_malloc (con->odr_out, no * sizeof(*databaseNames));
 262     no = 0;
 263     while (*cp)
 264     {
 265         c = strchr (cp, '+');
 266         if (!c)
 267             c = cp + strlen(cp);
 268         else if (c == cp)
 269         {
 270             cp++;
 271             continue;
 272         }
 273         /* cp ptr to first char of db name, c is char
 274            following db name */
 275         databaseNames[no] = (char*) odr_malloc (con->odr_out, 1+c-cp);
 276         memcpy (databaseNames[no], cp, c-cp);
 277         databaseNames[no++][c-cp] = '\0';
 278         cp = c;
 279         if (*cp)
 280             cp++;
 281     }
 282     databaseNames[no] = NULL;
 283     *num = no;
 284     return databaseNames;
 285 }
 286
 287 ZOOM_API(ZOOM_connection)
 288 ZOOM_connection_new (const char *host, int portnum)
 289 {
 290     ZOOM_connection c = ZOOM_connection_create (0);
 291
 292     ZOOM_connection_connect (c, host, portnum);
 293     return c;
 294 }
 295
 296 ZOOM_API(void)
 297 ZOOM_connection_connect(ZOOM_connection c,
 298                         const char *host, int portnum)
 299 {
 300     const char *val;
 301     ZOOM_task task;
 302
 303     if (c->cs)
 304     {
 305         yaz_log (LOG_DEBUG, "reconnect");
 306         c->reconnect_ok = 1;
 307         return;
 308     }
 309     yaz_log(LOG_DEBUG, "connect");
 310     xfree (c->proxy);
 311     val = ZOOM_options_get (c->options, "proxy");
 312     if (val && *val)
 313         c->proxy = xstrdup (val);
 314     else
 315         c->proxy = 0;
 316
 317     xfree (c->charset);
 318     val = ZOOM_options_get (c->options, "charset");
 319     if (val && *val)
 320         c->charset = xstrdup (val);
 321     else
 322         c->charset = 0;
 323
 324     xfree (c->lang);
 325     val = ZOOM_options_get (c->options, "lang");
 326     if (val && *val)
 327         c->lang = xstrdup (val);
 328     else
 329         c->lang = 0;
 330
 331     xfree (c->host_port);
 332     xfree (c->path);
 333     if (portnum)
 334     {
 335         char hostn[128];
 336         sprintf (hostn, "%.80s:%d", host, portnum);
 337         c->host_port = xstrdup(hostn);
 338     }
 339     else
 340         c->host_port = xstrdup(host);
 341
 342     ZOOM_options_set(c->options, "host", c->host_port);
 343
 344     val = ZOOM_options_get (c->options, "cookie");
 345     if (val && *val)
 346         c->cookie_out = xstrdup (val);
 347
 348     val = ZOOM_options_get (c->options, "clientIP");
 349     if (val && *val)
 350         c->client_IP = xstrdup (val);
 351
 352     c->async = ZOOM_options_get_bool (c->options, "async", 0);
 353
 354     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 355
 356     task = ZOOM_connection_add_task (c, ZOOM_TASK_CONNECT);
 357
 358     if (!c->async)
 359     {
 360         while (ZOOM_event (1, &c))
 361             ;
 362     }
 363 }
 364
 365 ZOOM_API(ZOOM_query)
 366 ZOOM_query_create(void)
 367 {
 368     ZOOM_query s = (ZOOM_query) xmalloc (sizeof(*s));
 369
 370     s->refcount = 1;
 371     s->z_query = 0;
 372     s->sort_spec = 0;
 373     s->odr = odr_createmem (ODR_ENCODE);
 374
 375     return s;
 376 }
 377
 378 ZOOM_API(void)
 379 ZOOM_query_destroy(ZOOM_query s)
 380 {
 381     if (!s)
 382         return;
 383
 384     (s->refcount)--;
 385     yaz_log (LOG_DEBUG, "ZOOM_query_destroy count=%d", s->refcount);
 386     if (s->refcount == 0)
 387     {
 388         odr_destroy (s->odr);
 389         xfree (s);
 390     }
 391 }
 392
 393 ZOOM_API(int)
 394 ZOOM_query_prefix(ZOOM_query s, const char *str)
 395 {
 396     s->z_query = (Z_Query *) odr_malloc (s->odr, sizeof(*s->z_query));
 397     s->z_query->which = Z_Query_type_1;
 398     s->z_query->u.type_1 =  p_query_rpn(s->odr, PROTO_Z3950, str);
 399     if (!s->z_query->u.type_1)
 400         return -1;
 401     return 0;
 402 }
 403
 404 ZOOM_API(int)
 405 ZOOM_query_cql(ZOOM_query s, const char *str)
 406 {
 407     Z_External *ext;
 408
 409     ext = (Z_External *) odr_malloc(s->odr, sizeof(*ext));
 410     ext->direct_reference = odr_getoidbystr(s->odr, "1.2.840.10003.16.2");
 411     ext->indirect_reference = 0;
 412     ext->descriptor = 0;
 413     ext->which = Z_External_CQL;
 414     ext->u.cql = odr_strdup(s->odr, str);
 415
 416     s->z_query = (Z_Query *) odr_malloc (s->odr, sizeof(*s->z_query));
 417     s->z_query->which = Z_Query_type_104;
 418     s->z_query->u.type_104 =  ext;
 419     return 0;
 420 }
 421
 422 ZOOM_API(int)
 423 ZOOM_query_sortby(ZOOM_query s, const char *criteria)
 424 {
 425     s->sort_spec = yaz_sort_spec (s->odr, criteria);
 426     if (!s->sort_spec)
 427         return -1;
 428     return 0;
 429 }
 430
 431 static zoom_ret do_write(ZOOM_connection c);
 432
 433 ZOOM_API(void)
 434 ZOOM_connection_destroy(ZOOM_connection c)
 435 {
 436     ZOOM_resultset r;
 437     if (!c)
 438         return;
 439     if (c->cs)
 440         cs_close (c->cs);
 441     for (r = c->resultsets; r; r = r->next)
 442         r->connection = 0;
 443
 444     xfree (c->buf_in);
 445     xfree (c->addinfo);
 446     odr_destroy (c->odr_in);
 447     odr_destroy (c->odr_out);
 448     ZOOM_options_destroy (c->options);
 449     ZOOM_connection_remove_tasks (c);
 450     xfree (c->host_port);
 451     xfree (c->proxy);
 452     xfree (c->charset);
 453     xfree (c->lang);
 454     xfree (c->cookie_out);
 455     xfree (c->cookie_in);
 456     xfree (c->client_IP);
 457     xfree (c);
 458 }
 459
 460 void ZOOM_resultset_addref (ZOOM_resultset r)
 461 {
 462     if (r)
 463     {
 464         (r->refcount)++;
 465         yaz_log (LOG_DEBUG, "ZOOM_resultset_addref r=%p count=%d",
 466                  r, r->refcount);
 467     }
 468 }
 469 ZOOM_resultset ZOOM_resultset_create ()
 470 {
 471     ZOOM_resultset r = (ZOOM_resultset) xmalloc (sizeof(*r));
 472
 473     yaz_log (LOG_DEBUG, "ZOOM_resultset_create r = %p", r);
 474     r->refcount = 1;
 475     r->size = 0;
 476     r->odr = odr_createmem (ODR_ENCODE);
 477     r->start = 0;
 478     r->piggyback = 1;
 479     r->setname = 0;
 480     r->count = 0;
 481     r->record_cache = 0;
 482     r->r_sort_spec = 0;
 483     r->z_query = 0;
 484     r->search = 0;
 485     r->connection = 0;
 486     r->next = 0;
 487     return r;
 488 }
 489
 490 ZOOM_API(ZOOM_resultset)
 491 ZOOM_connection_search_pqf(ZOOM_connection c, const char *q)
 492 {
 493     ZOOM_resultset r;
 494     ZOOM_query s = ZOOM_query_create();
 495
 496     ZOOM_query_prefix (s, q);
 497
 498     r = ZOOM_connection_search (c, s);
 499     ZOOM_query_destroy (s);
 500     return r;
 501 }
 502
 503 ZOOM_API(ZOOM_resultset)
 504 ZOOM_connection_search(ZOOM_connection c, ZOOM_query q)
 505 {
 506     ZOOM_resultset r = ZOOM_resultset_create ();
 507     ZOOM_task task;
 508     const char *cp;
 509
 510     r->r_sort_spec = q->sort_spec;
 511     r->z_query = q->z_query;
 512     r->search = q;
 513
 514     r->options = ZOOM_options_create_with_parent(c->options);
 515
 516     r->start = ZOOM_options_get_int(r->options, "start", 0);
 517     r->count = ZOOM_options_get_int(r->options, "count", 0);
 518     r->piggyback = ZOOM_options_get_bool (r->options, "piggyback", 1);
 519     cp = ZOOM_options_get (r->options, "setname");
 520     if (cp)
 521         r->setname = xstrdup (cp);
 522
 523     r->connection = c;
 524
 525     r->next = c->resultsets;
 526     c->resultsets = r;
 527
 528     task = ZOOM_connection_add_task (c, ZOOM_TASK_SEARCH);
 529     task->u.search.resultset = r;
 530     ZOOM_resultset_addref (r);
 531
 532     (q->refcount)++;
 533
 534     if (!c->async)
 535     {
 536         while (ZOOM_event (1, &c))
 537             ;
 538     }
 539     return r;
 540 }
 541
 542 ZOOM_API(void)
 543 ZOOM_resultset_destroy(ZOOM_resultset r)
 544 {
 545     if (!r)
 546         return;
 547     (r->refcount)--;
 548     yaz_log (LOG_DEBUG, "ZOOM_resultset_destroy r = %p count=%d",
 549              r, r->refcount);
 550     if (r->refcount == 0)
 551     {
 552         ZOOM_record_cache rc;
 553
 554         for (rc = r->record_cache; rc; rc = rc->next)
 555             if (rc->rec.wrbuf_marc)
 556                 wrbuf_free (rc->rec.wrbuf_marc, 1);
 557         if (r->connection)
 558         {
 559             /* remove ourselves from the resultsets in connection */
 560             ZOOM_resultset *rp = &r->connection->resultsets;
 561             while (1)
 562             {
 563                 assert (*rp);   /* we must be in this list!! */
 564                 if (*rp == r)
 565                 {   /* OK, we're here - take us out of it */
 566                     *rp = (*rp)->next;
 567                     break;
 568                 }
 569                 rp = &(*rp)->next;
 570             }
 571         }
 572         ZOOM_query_destroy (r->search);
 573         ZOOM_options_destroy (r->options);
 574         odr_destroy (r->odr);
 575         xfree (r->setname);
 576         xfree (r);
 577     }
 578 }
 579
 580 ZOOM_API(size_t)
 581 ZOOM_resultset_size (ZOOM_resultset r)
 582 {
 583     return r->size;
 584 }
 585
 586 static void do_close (ZOOM_connection c)
 587 {
 588     if (c->cs)
 589         cs_close(c->cs);
 590     c->cs = 0;
 591     c->mask = 0;
 592     c->state = STATE_IDLE;
 593 }
 594
 595 static void ZOOM_resultset_retrieve (ZOOM_resultset r,
 596                                      int force_sync, int start, int count)
 597 {
 598     ZOOM_task task;
 599     ZOOM_connection c;
 600
 601     if (!r)
 602         return;
 603     c = r->connection;
 604     if (!c)
 605         return;
 606     task = ZOOM_connection_add_task (c, ZOOM_TASK_RETRIEVE);
 607     task->u.retrieve.resultset = r;
 608     task->u.retrieve.start = start;
 609     task->u.retrieve.count = count;
 610
 611     ZOOM_resultset_addref (r);
 612
 613     if (!r->connection->async || force_sync)
 614         while (r->connection && ZOOM_event (1, &r->connection))
 615             ;
 616 }
 617
 618 ZOOM_API(void)
 619 ZOOM_resultset_records (ZOOM_resultset r, ZOOM_record *recs,
 620                         size_t start, size_t count)
 621 {
 622     int force_present = 0;
 623
 624     if (!r)
 625         return ;
 626     if (count && recs)
 627         force_present = 1;
 628     ZOOM_resultset_retrieve (r, force_present, start, count);
 629     if (force_present)
 630     {
 631         size_t i;
 632         for (i = 0; i< count; i++)
 633             recs[i] = ZOOM_resultset_record_immediate (r, i+start);
 634     }
 635 }
 636
 637 static zoom_ret do_connect (ZOOM_connection c)
 638 {
 639     void *add;
 640     const char *effective_host;
 641
 642     if (c->proxy)
 643         effective_host = c->proxy;
 644     else
 645         effective_host = c->host_port;
 646
 647     yaz_log (LOG_DEBUG, "do_connect host=%s", effective_host);
 648
 649     assert (!c->cs);
 650
 651     if (memcmp(c->host_port, "http:", 5) == 0)
 652     {
 653 #if HAVE_XSLT
 654         const char *path;
 655         c->proto = PROTO_SRW;
 656         effective_host = c->host_port + 5;
 657         if (*effective_host == '/')
 658             effective_host++;
 659         if (*effective_host == '/')
 660             effective_host++;
 661         if (!(path = strchr(effective_host, '/')))
 662             path = "/";
 663         xfree(c->path);
 664         c->path = xstrdup(path);
 665 #else
 666         c->state = STATE_IDLE;
 667         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_PROTOCOL, "SRW");
 668         return zoom_complete;
 669 #endif
 670     }
 671     c->cs = cs_create_host (effective_host, 0, &add);
 672
 673     if (c->cs)
 674     {
 675         int ret = cs_connect (c->cs, add);
 676         if (ret == 0)
 677         {
 678             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_CONNECT);
 679             ZOOM_connection_put_event(c, event);
 680             if (c->proto == PROTO_Z3950)
 681                 ZOOM_connection_send_init(c);
 682             else
 683             {
 684                 /* no init request for SRW .. */
 685                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
 686                 ZOOM_connection_remove_task (c);
 687                 c->mask = 0;
 688                 ZOOM_connection_exec_task (c);
 689             }
 690             c->state = STATE_ESTABLISHED;
 691             return zoom_pending;
 692         }
 693         else if (ret > 0)
 694         {
 695             c->state = STATE_CONNECTING;
 696             c->mask = ZOOM_SELECT_EXCEPT;
 697             if (c->cs->io_pending & CS_WANT_WRITE)
 698                 c->mask += ZOOM_SELECT_WRITE;
 699             if (c->cs->io_pending & CS_WANT_READ)
 700                 c->mask += ZOOM_SELECT_READ;
 701             return zoom_pending;
 702         }
 703     }
 704     c->state = STATE_IDLE;
 705     set_ZOOM_error(c, ZOOM_ERROR_CONNECT, effective_host);
 706     return zoom_complete;
 707 }
 708
 709 int z3950_connection_socket(ZOOM_connection c)
 710 {
 711     if (c->cs)
 712         return cs_fileno(c->cs);
 713     return -1;
 714 }
 715
 716 int z3950_connection_mask(ZOOM_connection c)
 717 {
 718     if (c->cs)
 719         return c->mask;
 720     return 0;
 721 }
 722
 723 static void otherInfo_attach (ZOOM_connection c, Z_APDU *a, ODR out)
 724 {
 725     int i;
 726     for (i = 0; i<200; i++)
 727     {
 728         size_t len;
 729         Z_OtherInformation **oi;
 730         char buf[80];
 731         const char *val;
 732         const char *cp;
 733         int oidval;
 734
 735         sprintf (buf, "otherInfo%d", i);
 736         val = ZOOM_options_get (c->options, buf);
 737         if (!val)
 738             break;
 739         cp = strchr (val, ':');
 740         if (!cp)
 741             continue;
 742         len = cp - val;
 743         if (len >= sizeof(buf))
 744             len = sizeof(buf)-1;
 745         memcpy (buf, val, len);
 746         buf[len] = '\0';
 747         oidval = oid_getvalbyname (buf);
 748         if (oidval == VAL_NONE)
 749             continue;
 750
 751         yaz_oi_APDU(a, &oi);
 752         yaz_oi_set_string_oidval(oi, out, oidval, 1, cp+1);
 753     }
 754 }
 755
 756 static int encode_APDU(ZOOM_connection c, Z_APDU *a, ODR out)
 757 {
 758     assert (a);
 759     if (c->cookie_out)
 760     {
 761         Z_OtherInformation **oi;
 762         yaz_oi_APDU(a, &oi);
 763         yaz_oi_set_string_oidval(oi, out, VAL_COOKIE, 1, c->cookie_out);
 764     }
 765     if (c->client_IP)
 766     {
 767         Z_OtherInformation **oi;
 768         yaz_oi_APDU(a, &oi);
 769         yaz_oi_set_string_oidval(oi, out, VAL_CLIENT_IP, 1, c->client_IP);
 770     }
 771     otherInfo_attach (c, a, out);
 772     if (!z_APDU(out, &a, 0, 0))
 773     {
 774         FILE *outf = fopen("/tmp/apdu.txt", "a");
 775         if (a && outf)
 776         {
 777             ODR odr_pr = odr_createmem(ODR_PRINT);
 778             fprintf (outf, "a=%p\n", a);
 779             odr_setprint(odr_pr, outf);
 780             z_APDU(odr_pr, &a, 0, 0);
 781             odr_destroy(odr_pr);
 782         }
 783         yaz_log (LOG_DEBUG, "encoding failed");
 784         set_ZOOM_error(c, ZOOM_ERROR_ENCODE, 0);
 785         odr_reset(out);
 786         return -1;
 787     }
 788
 789     return 0;
 790 }
 791
 792 static zoom_ret send_APDU (ZOOM_connection c, Z_APDU *a)
 793 {
 794     ZOOM_Event event;
 795     assert (a);
 796     if (encode_APDU(c, a, c->odr_out))
 797         return zoom_complete;
 798     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
 799     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
 800     ZOOM_connection_put_event (c, event);
 801     odr_reset(c->odr_out);
 802     return do_write (c);
 803 }
 804
 805 /* returns 1 if PDU was sent OK (still pending )
 806            0 if PDU was not sent OK (nothing to wait for)
 807 */
 808
 809 static zoom_ret ZOOM_connection_send_init (ZOOM_connection c)
 810 {
 811     const char *impname;
 812     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_initRequest);
 813     Z_InitRequest *ireq = apdu->u.initRequest;
 814     Z_IdAuthentication *auth = (Z_IdAuthentication *)
 815         odr_malloc(c->odr_out, sizeof(*auth));
 816     const char *auth_groupId = ZOOM_options_get (c->options, "group");
 817     const char *auth_userId = ZOOM_options_get (c->options, "user");
 818     const char *auth_password = ZOOM_options_get (c->options, "pass");
 819
 820     ODR_MASK_SET(ireq->options, Z_Options_search);
 821     ODR_MASK_SET(ireq->options, Z_Options_present);
 822     ODR_MASK_SET(ireq->options, Z_Options_scan);
 823     ODR_MASK_SET(ireq->options, Z_Options_sort);
 824     ODR_MASK_SET(ireq->options, Z_Options_extendedServices);
 825     ODR_MASK_SET(ireq->options, Z_Options_namedResultSets);
 826
 827     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_1);
 828     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_2);
 829     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_3);
 830
 831     impname = ZOOM_options_get (c->options, "implementationName");
 832     ireq->implementationName =
 833         (char *) odr_malloc (c->odr_out, 15 + (impname ? strlen(impname) : 0));
 834     strcpy (ireq->implementationName, "");
 835     if (impname)
 836     {
 837         strcat (ireq->implementationName, impname);
 838         strcat (ireq->implementationName, "/");
 839     }
 840     strcat (ireq->implementationName, "ZOOM-C/YAZ");
 841
 842     *ireq->maximumRecordSize =
 843         ZOOM_options_get_int (c->options, "maximumRecordSize", 1024*1024);
 844     *ireq->preferredMessageSize =
 845         ZOOM_options_get_int (c->options, "preferredMessageSize", 1024*1024);
 846
 847     if (auth_groupId || auth_password)
 848     {
 849         Z_IdPass *pass = (Z_IdPass *) odr_malloc(c->odr_out, sizeof(*pass));
 850         int i = 0;
 851         pass->groupId = 0;
 852         if (auth_groupId && *auth_groupId)
 853         {
 854             pass->groupId = (char *)
 855                 odr_malloc(c->odr_out, strlen(auth_groupId)+1);
 856             strcpy(pass->groupId, auth_groupId);
 857             i++;
 858         }
 859         pass->userId = 0;
 860         if (auth_userId && *auth_userId)
 861         {
 862             pass->userId = (char *)
 863                 odr_malloc(c->odr_out, strlen(auth_userId)+1);
 864             strcpy(pass->userId, auth_userId);
 865             i++;
 866         }
 867         pass->password = 0;
 868         if (auth_password && *auth_password)
 869         {
 870             pass->password = (char *)
 871                 odr_malloc(c->odr_out, strlen(auth_password)+1);
 872             strcpy(pass->password, auth_password);
 873             i++;
 874         }
 875         if (i)
 876         {
 877             auth->which = Z_IdAuthentication_idPass;
 878             auth->u.idPass = pass;
 879             ireq->idAuthentication = auth;
 880         }
 881     }
 882     else if (auth_userId)
 883     {
 884         auth->which = Z_IdAuthentication_open;
 885         auth->u.open = (char *)
 886             odr_malloc(c->odr_out, strlen(auth_userId)+1);
 887         strcpy(auth->u.open, auth_userId);
 888         ireq->idAuthentication = auth;
 889     }
 890     if (c->proxy)
 891         yaz_oi_set_string_oidval(&ireq->otherInfo, c->odr_out,
 892                                  VAL_PROXY, 1, c->host_port);
 893     if (c->charset||c->lang)
 894     {
 895         Z_OtherInformation **oi;
 896         Z_OtherInformationUnit *oi_unit;
 897
 898         yaz_oi_APDU(apdu, &oi);
 899
 900         if ((oi_unit = yaz_oi_update(oi, c->odr_out, NULL, 0, 0)))
 901         {
 902             ODR_MASK_SET(ireq->options, Z_Options_negotiationModel);
 903
 904             oi_unit->which = Z_OtherInfo_externallyDefinedInfo;
 905             oi_unit->information.externallyDefinedInfo =
 906                 yaz_set_proposal_charneg
 907                 (c->odr_out,
 908                  (const char **)&c->charset, (c->charset) ? 1:0,
 909                  (const char **)&c->lang, (c->lang) ? 1:0, 1);
 910         }
 911     }
 912     assert (apdu);
 913     return send_APDU (c, apdu);
 914 }
 915
 916 #if HAVE_XSLT
 917 static zoom_ret send_srw (ZOOM_connection c, Z_SRW_searchRetrieve *sr)
 918 {
 919     Z_SOAP_Handler h[2] = {
 920         {"http://www.loc.gov/zing/srw/v1.0/", 0, (Z_SOAP_fun) yaz_srw_codec},
 921         {0, 0, 0}
 922     };
 923     ODR o = odr_createmem(ODR_ENCODE);
 924     int ret;
 925     Z_SOAP *p = odr_malloc(o, sizeof(*p));
 926     Z_GDU *gdu;
 927     ZOOM_Event event;
 928
 929     gdu = z_get_HTTP_Request(c->odr_out);
 930     gdu->u.HTTP_Request->path = c->path;
 931     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
 932                       "Content-Type", "text/xml");
 933     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
 934                       "SOAPAction", "\"\"");
 935     p->which = Z_SOAP_generic;
 936     p->u.generic = odr_malloc(o, sizeof(*p->u.generic));
 937     p->u.generic->no = 0;
 938     p->u.generic->ns = 0;
 939     p->u.generic->p = sr;
 940     p->ns = "http://schemas.xmlsoap.org/soap/envelope/";
 941
 942     ret = z_soap_codec(o, &p,
 943                        &gdu->u.HTTP_Request->content_buf,
 944                        &gdu->u.HTTP_Request->content_len, h);
 945
 946     if (!z_GDU(c->odr_out, &gdu, 0, 0))
 947         return zoom_complete;
 948     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
 949
 950     odr_destroy(o);
 951
 952     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
 953     ZOOM_connection_put_event (c, event);
 954     odr_reset(c->odr_out);
 955     return do_write (c);
 956 }
 957 #endif
 958
 959 #if HAVE_XSLT
 960 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
 961 {
 962     ZOOM_resultset resultset;
 963     Z_SRW_searchRetrieve *sr = yaz_srw_get(c->odr_out,
 964                                            Z_SRW_searchRetrieve_request);
 965
 966     assert (c->tasks);
 967     assert (c->tasks->which == ZOOM_TASK_SEARCH);
 968
 969     resultset = c->tasks->u.search.resultset;
 970     assert(resultset);
 971     assert (resultset->z_query);
 972
 973     if (resultset->z_query->which == Z_Query_type_104
 974         && resultset->z_query->u.type_104->which == Z_External_CQL)
 975         sr->u.request->query = resultset->z_query->u.type_104->u.cql;
 976     else
 977         sr->u.request->query = "dc.title = computer";
 978
 979     sr->u.request->startRecord = odr_intdup (c->odr_out, resultset->start + 1);
 980     sr->u.request->maximumRecords = odr_intdup (c->odr_out, resultset->count);
 981
 982     return send_srw(c, sr);
 983 }
 984 #else
 985 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
 986 {
 987     return zoom_complete;
 988 }
 989 #endif
 990
 991 static zoom_ret ZOOM_connection_send_search (ZOOM_connection c)
 992 {
 993     ZOOM_resultset r;
 994     int lslb, ssub, mspn;
 995     const char *syntax;
 996     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_searchRequest);
 997     Z_SearchRequest *search_req = apdu->u.searchRequest;
 998     const char *elementSetName;
 999     const char *smallSetElementSetName;
1000     const char *mediumSetElementSetName;
1001     const char *schema;
1002
1003     assert (c->tasks);
1004     assert (c->tasks->which == ZOOM_TASK_SEARCH);
1005
1006     r = c->tasks->u.search.resultset;
1007
1008     elementSetName =
1009         ZOOM_options_get (r->options, "elementSetName");
1010     smallSetElementSetName  =
1011         ZOOM_options_get (r->options, "smallSetElementSetName");
1012     mediumSetElementSetName =
1013         ZOOM_options_get (r->options, "mediumSetElementSetName");
1014     schema =
1015         ZOOM_options_get (r->options, "schema");
1016
1017     if (!smallSetElementSetName)
1018         smallSetElementSetName = elementSetName;
1019
1020     if (!mediumSetElementSetName)
1021         mediumSetElementSetName = elementSetName;
1022
1023     assert (r);
1024     assert (r->z_query);
1025
1026     /* prepare query for the search request */
1027     search_req->query = r->z_query;
1028
1029     search_req->databaseNames =
1030         set_DatabaseNames (c, r->options, &search_req->num_databaseNames);
1031
1032     /* get syntax (no need to provide unless piggyback is in effect) */
1033     syntax = ZOOM_options_get (r->options, "preferredRecordSyntax");
1034
1035     lslb = ZOOM_options_get_int (r->options, "largeSetLowerBound", -1);
1036     ssub = ZOOM_options_get_int (r->options, "smallSetUpperBound", -1);
1037     mspn = ZOOM_options_get_int (r->options, "mediumSetPresentNumber", -1);
1038     if (lslb != -1 && ssub != -1 && mspn != -1)
1039     {
1040         /* So're a Z39.50 expert? Let's hope you don't do sort */
1041         *search_req->largeSetLowerBound = lslb;
1042         *search_req->smallSetUpperBound = ssub;
1043         *search_req->mediumSetPresentNumber = mspn;
1044     }
1045     else if (r->start == 0 && r->count > 0
1046              && r->piggyback && !r->r_sort_spec && !schema)
1047     {
1048         /* Regular piggyback - do it unless we're going to do sort */
1049         *search_req->largeSetLowerBound = 2000000000;
1050         *search_req->smallSetUpperBound = 0;
1051         *search_req->mediumSetPresentNumber = r->count;
1052         smallSetElementSetName = 0;
1053     }
1054     else
1055     {
1056         /* non-piggyback. Need not provide elementsets or syntaxes .. */
1057         smallSetElementSetName = 0;
1058         mediumSetElementSetName = 0;
1059         syntax = 0;
1060     }
1061     if (smallSetElementSetName && *smallSetElementSetName)
1062     {
1063         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1064             odr_malloc (c->odr_out, sizeof(*esn));
1065
1066         esn->which = Z_ElementSetNames_generic;
1067         esn->u.generic = odr_strdup (c->odr_out, smallSetElementSetName);
1068         search_req->smallSetElementSetNames = esn;
1069     }
1070     if (mediumSetElementSetName && *mediumSetElementSetName)
1071     {
1072         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1073             odr_malloc (c->odr_out, sizeof(*esn));
1074
1075         esn->which = Z_ElementSetNames_generic;
1076         esn->u.generic = odr_strdup (c->odr_out, mediumSetElementSetName);
1077         search_req->mediumSetElementSetNames = esn;
1078     }
1079     if (syntax)
1080         search_req->preferredRecordSyntax =
1081             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1082
1083     if (!r->setname)
1084     {
1085         if (c->support_named_resultsets)
1086         {
1087             char setname[14];
1088             int ord;
1089             /* find the lowest unused ordinal so that we re-use
1090                result sets on the server. */
1091             for (ord = 1; ; ord++)
1092             {
1093                 ZOOM_resultset rp;
1094                 sprintf (setname, "%d", ord);
1095                 for (rp = c->resultsets; rp; rp = rp->next)
1096                     if (rp->setname && !strcmp (rp->setname, setname))
1097                         break;
1098                 if (!rp)
1099                     break;
1100             }
1101             r->setname = xstrdup (setname);
1102             yaz_log (LOG_DEBUG, "allocating set %s", r->setname);
1103         }
1104         else
1105             r->setname = xstrdup ("default");
1106         ZOOM_options_set (r->options, "setname", r->setname);
1107     }
1108     search_req->resultSetName = odr_strdup(c->odr_out, r->setname);
1109     /* send search request */
1110     return send_APDU (c, apdu);
1111 }
1112
1113 static void response_diag (ZOOM_connection c, Z_DiagRec *p)
1114 {
1115     int oclass;
1116     Z_DefaultDiagFormat *r;
1117     char *addinfo = 0;
1118
1119     xfree (c->addinfo);
1120     c->addinfo = 0;
1121     if (p->which != Z_DiagRec_defaultFormat)
1122     {
1123         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1124         return;
1125     }
1126     r = p->u.defaultFormat;
1127     c->diagset = yaz_z3950oid_to_str(r->diagnosticSetId, &oclass);
1128
1129     switch (r->which)
1130     {
1131     case Z_DefaultDiagFormat_v2Addinfo:
1132         addinfo = r->u.v2Addinfo;
1133         break;
1134     case Z_DefaultDiagFormat_v3Addinfo:
1135         addinfo = r->u.v3Addinfo;
1136         break;
1137     }
1138     if (addinfo)
1139         c->addinfo = xstrdup (addinfo);
1140     c->error = *r->condition;
1141 }
1142
1143 ZOOM_API(ZOOM_record)
1144 ZOOM_record_clone (ZOOM_record srec)
1145 {
1146     char *buf;
1147     int size;
1148     ODR odr_enc;
1149     ZOOM_record nrec;
1150
1151     odr_enc = odr_createmem(ODR_ENCODE);
1152     if (!z_NamePlusRecord (odr_enc, &srec->npr, 0, 0))
1153         return 0;
1154     buf = odr_getbuf (odr_enc, &size, 0);
1155
1156     nrec = (ZOOM_record) xmalloc (sizeof(*nrec));
1157     nrec->odr = odr_createmem(ODR_DECODE);
1158     nrec->wrbuf_marc = 0;
1159     odr_setbuf (nrec->odr, buf, size, 0);
1160     z_NamePlusRecord (nrec->odr, &nrec->npr, 0, 0);
1161
1162     odr_destroy (odr_enc);
1163     return nrec;
1164 }
1165
1166 ZOOM_API(ZOOM_record)
1167 ZOOM_resultset_record_immediate (ZOOM_resultset s,size_t pos)
1168 {
1169     return record_cache_lookup (s, pos);
1170 }
1171
1172 ZOOM_API(ZOOM_record)
1173 ZOOM_resultset_record (ZOOM_resultset r, size_t pos)
1174 {
1175     ZOOM_resultset_retrieve (r, 1, pos, 1);
1176     return ZOOM_resultset_record_immediate (r, pos);
1177 }
1178
1179 ZOOM_API(void)
1180 ZOOM_record_destroy (ZOOM_record rec)
1181 {
1182     if (!rec)
1183         return;
1184     if (rec->wrbuf_marc)
1185         wrbuf_free (rec->wrbuf_marc, 1);
1186     odr_destroy (rec->odr);
1187     xfree (rec);
1188 }
1189
1190 ZOOM_API(const char *)
1191 ZOOM_record_get (ZOOM_record rec, const char *type, int *len)
1192 {
1193     Z_NamePlusRecord *npr;
1194
1195     if (len)
1196         *len = 0; /* default return */
1197
1198     if (!rec)
1199         return 0;
1200     npr = rec->npr;
1201     if (!npr)
1202         return 0;
1203     if (!strcmp (type, "database"))
1204     {
1205         if (len)
1206             *len = (npr->databaseName ? strlen(npr->databaseName) : 0);
1207         return npr->databaseName;
1208     }
1209     else if (!strcmp (type, "syntax"))
1210     {
1211         const char *desc = 0;
1212         if (npr->which == Z_NamePlusRecord_databaseRecord)
1213         {
1214             Z_External *r = (Z_External *) npr->u.databaseRecord;
1215             oident *ent = oid_getentbyoid(r->direct_reference);
1216             if (ent)
1217                 desc = ent->desc;
1218         }
1219         if (!desc)
1220             desc = "none";
1221         if (len)
1222             *len = strlen(desc);
1223         return desc;
1224     }
1225     else if (!strcmp (type, "render") &&
1226              npr->which == Z_NamePlusRecord_databaseRecord)
1227     {
1228         Z_External *r = (Z_External *) npr->u.databaseRecord;
1229         oident *ent = oid_getentbyoid(r->direct_reference);
1230
1231         if (r->which == Z_External_sutrs)
1232         {
1233             if (len) *len = r->u.sutrs->len;
1234             return (const char *) r->u.sutrs->buf;
1235         }
1236         else if (r->which == Z_External_octet)
1237         {
1238             yaz_marc_t mt;
1239             switch (ent->value)
1240             {
1241             case VAL_SOIF:
1242             case VAL_HTML:
1243             case VAL_SUTRS:
1244                 break;
1245             case VAL_TEXT_XML:
1246             case VAL_APPLICATION_XML:
1247                 break;
1248             default:
1249                 if (!rec->wrbuf_marc)
1250                     rec->wrbuf_marc = wrbuf_alloc();
1251
1252                 mt = yaz_marc_create();
1253                 wrbuf_rewind (rec->wrbuf_marc);
1254                 if (yaz_marc_decode_wrbuf (
1255                         mt, (const char *) r->u.octet_aligned->buf,
1256                         r->u.octet_aligned->len,
1257                         rec->wrbuf_marc) > 0)
1258                 {
1259                     if (len)
1260                         *len = wrbuf_len(rec->wrbuf_marc);
1261                     yaz_marc_destroy(mt);
1262                     return wrbuf_buf(rec->wrbuf_marc);
1263                 }
1264                 yaz_marc_destroy(mt);
1265             }
1266             if (len)
1267                 *len = r->u.octet_aligned->len;
1268             return (const char *) r->u.octet_aligned->buf;
1269         }
1270         else if (r->which == Z_External_grs1)
1271         {
1272             if (!rec->wrbuf_marc)
1273                 rec->wrbuf_marc = wrbuf_alloc();
1274             wrbuf_rewind (rec->wrbuf_marc);
1275             yaz_display_grs1(rec->wrbuf_marc, r->u.grs1, 0);
1276             if (len)
1277                 *len = wrbuf_len(rec->wrbuf_marc);
1278             return wrbuf_buf(rec->wrbuf_marc);
1279         }
1280         return 0;
1281     }
1282     else if (npr->which == Z_NamePlusRecord_databaseRecord &&
1283              (!strcmp (type, "xml") || !strcmp(type, "oai")))
1284     {
1285         Z_External *r = (Z_External *) npr->u.databaseRecord;
1286         oident *ent = oid_getentbyoid(r->direct_reference);
1287
1288         if (r->which == Z_External_sutrs)
1289         {
1290             if (len) *len = r->u.sutrs->len;
1291             return (const char *) r->u.sutrs->buf;
1292         }
1293         else if (r->which == Z_External_octet)
1294         {
1295             yaz_marc_t mt;
1296             int marc_decode_type = YAZ_MARC_MARCXML;
1297
1298             if (!strcmp(type, "oai"))
1299                 marc_decode_type = YAZ_MARC_OAIMARC;
1300             switch (ent->value)
1301             {
1302             case VAL_SOIF:
1303             case VAL_HTML:
1304             case VAL_SUTRS:
1305                 break;
1306             case VAL_TEXT_XML:
1307             case VAL_APPLICATION_XML:
1308                 break;
1309             default:
1310                 if (!rec->wrbuf_marc)
1311                     rec->wrbuf_marc = wrbuf_alloc();
1312                 wrbuf_rewind (rec->wrbuf_marc);
1313                 mt = yaz_marc_create();
1314
1315                 yaz_marc_xml(mt, YAZ_MARC_MARCXML);
1316                 if (yaz_marc_decode_wrbuf (
1317                         mt, (const char *) r->u.octet_aligned->buf,
1318                         r->u.octet_aligned->len,
1319                         rec->wrbuf_marc) > 0)
1320                 {
1321                     if (len)
1322                         *len = wrbuf_len(rec->wrbuf_marc);
1323                     yaz_marc_destroy(mt);
1324                     return wrbuf_buf(rec->wrbuf_marc);
1325                 }
1326                 yaz_marc_destroy(mt);
1327             }
1328             if (len) *len = r->u.octet_aligned->len;
1329             return (const char *) r->u.octet_aligned->buf;
1330         }
1331         else if (r->which == Z_External_grs1)
1332         {
1333             if (len) *len = 5;
1334             return "GRS-1";
1335         }
1336         return 0;
1337     }
1338     else if (!strcmp (type, "raw"))
1339     {
1340         if (npr->which == Z_NamePlusRecord_databaseRecord)
1341         {
1342             Z_External *r = (Z_External *) npr->u.databaseRecord;
1343
1344             if (r->which == Z_External_sutrs)
1345             {
1346                 if (len) *len = r->u.sutrs->len;
1347                 return (const char *) r->u.sutrs->buf;
1348             }
1349             else if (r->which == Z_External_octet)
1350             {
1351                 if (len) *len = r->u.octet_aligned->len;
1352                 return (const char *) r->u.octet_aligned->buf;
1353             }
1354             else /* grs-1, explain, ... */
1355             {
1356                 if (len) *len = -1;
1357                 return (const char *) npr->u.databaseRecord;
1358             }
1359         }
1360         return 0;
1361     }
1362     else if (!strcmp (type, "ext"))
1363     {
1364         if (npr->which == Z_NamePlusRecord_databaseRecord)
1365             return (const char *) npr->u.databaseRecord;
1366         return 0;
1367     }
1368     return 0;
1369 }
1370
1371 static void record_cache_add (ZOOM_resultset r, Z_NamePlusRecord *npr, int pos)
1372 {
1373     ZOOM_record_cache rc;
1374     const char *elementSetName =
1375         ZOOM_resultset_option_get (r, "elementSetName");
1376     const char *syntax =
1377         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1378
1379     for (rc = r->record_cache; rc; rc = rc->next)
1380     {
1381         if (pos == rc->pos)
1382         {
1383             if ((!elementSetName && !rc->elementSetName)
1384                 || (elementSetName && rc->elementSetName &&
1385                     !strcmp (elementSetName, rc->elementSetName)))
1386             {
1387                 if ((!syntax && !rc->syntax)
1388                     || (syntax && rc->syntax &&
1389                         !strcmp (syntax, rc->syntax)))
1390                 {
1391                     /* not destroying rc->npr (it's handled by nmem )*/
1392                     rc->rec.npr = npr;
1393                     /* keeping wrbuf_marc too */
1394                     return;
1395                 }
1396             }
1397         }
1398     }
1399     rc = (ZOOM_record_cache) odr_malloc (r->odr, sizeof(*rc));
1400     rc->rec.npr = npr;
1401     rc->rec.odr = 0;
1402     rc->rec.wrbuf_marc = 0;
1403     if (elementSetName)
1404         rc->elementSetName = odr_strdup (r->odr, elementSetName);
1405     else
1406         rc->elementSetName = 0;
1407
1408     if (syntax)
1409         rc->syntax = odr_strdup (r->odr, syntax);
1410     else
1411         rc->syntax = 0;
1412
1413     rc->pos = pos;
1414     rc->next = r->record_cache;
1415     r->record_cache = rc;
1416 }
1417
1418 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos)
1419 {
1420     ZOOM_record_cache rc;
1421     const char *elementSetName =
1422         ZOOM_resultset_option_get (r, "elementSetName");
1423     const char *syntax =
1424         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1425
1426     for (rc = r->record_cache; rc; rc = rc->next)
1427     {
1428         if (pos == rc->pos)
1429         {
1430             if ((!elementSetName && !rc->elementSetName)
1431                 || (elementSetName && rc->elementSetName &&
1432                     !strcmp (elementSetName, rc->elementSetName)))
1433             {
1434                 if ((!syntax && !rc->syntax)
1435                     || (syntax && rc->syntax &&
1436                         !strcmp (syntax, rc->syntax)))
1437                     return &rc->rec;
1438             }
1439         }
1440     }
1441     return 0;
1442 }
1443
1444 static void handle_records (ZOOM_connection c, Z_Records *sr,
1445                             int present_phase)
1446 {
1447     ZOOM_resultset resultset;
1448
1449     if (!c->tasks)
1450         return ;
1451     switch (c->tasks->which)
1452     {
1453     case ZOOM_TASK_SEARCH:
1454         resultset = c->tasks->u.search.resultset;
1455         break;
1456     case ZOOM_TASK_RETRIEVE:
1457         resultset = c->tasks->u.retrieve.resultset;
1458         break;
1459     default:
1460         return;
1461     }
1462     if (sr && sr->which == Z_Records_NSD)
1463     {
1464         Z_DiagRec dr, *dr_p = &dr;
1465         dr.which = Z_DiagRec_defaultFormat;
1466         dr.u.defaultFormat = sr->u.nonSurrogateDiagnostic;
1467
1468         response_diag (c, dr_p);
1469     }
1470     else if (sr && sr->which == Z_Records_multipleNSD)
1471     {
1472         if (sr->u.multipleNonSurDiagnostics->num_diagRecs >= 1)
1473             response_diag(c, sr->u.multipleNonSurDiagnostics->diagRecs[0]);
1474         else
1475             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1476     }
1477     else
1478     {
1479         if (resultset->count + resultset->start > resultset->size)
1480             resultset->count = resultset->size - resultset->start;
1481         if (resultset->count < 0)
1482             resultset->count = 0;
1483         if (sr && sr->which == Z_Records_DBOSD)
1484         {
1485             int i;
1486             NMEM nmem = odr_extract_mem (c->odr_in);
1487             Z_NamePlusRecordList *p =
1488                 sr->u.databaseOrSurDiagnostics;
1489             for (i = 0; i<p->num_records; i++)
1490             {
1491                 record_cache_add (resultset, p->records[i],
1492                                   i+ resultset->start);
1493             }
1494             /* transfer our response to search_nmem .. we need it later */
1495             nmem_transfer (resultset->odr->mem, nmem);
1496             nmem_destroy (nmem);
1497             if (present_phase && p->num_records == 0)
1498             {
1499                 /* present response and we didn't get any records! */
1500                 set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1501             }
1502         }
1503         else if (present_phase)
1504         {
1505             /* present response and we didn't get any records! */
1506             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1507         }
1508     }
1509 }
1510
1511 static void handle_present_response (ZOOM_connection c, Z_PresentResponse *pr)
1512 {
1513     handle_records (c, pr->records, 1);
1514 }
1515
1516 static void handle_search_response (ZOOM_connection c, Z_SearchResponse *sr)
1517 {
1518     ZOOM_resultset resultset;
1519
1520     yaz_log (LOG_DEBUG, "got search response");
1521
1522     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1523         return ;
1524
1525     resultset = c->tasks->u.search.resultset;
1526
1527     resultset->size = *sr->resultCount;
1528     handle_records (c, sr->records, 0);
1529 }
1530
1531 static void sort_response (ZOOM_connection c, Z_SortResponse *res)
1532 {
1533     if (res->diagnostics && res->num_diagnostics > 0)
1534         response_diag (c, res->diagnostics[0]);
1535 }
1536
1537 static int scan_response (ZOOM_connection c, Z_ScanResponse *res)
1538 {
1539     NMEM nmem = odr_extract_mem (c->odr_in);
1540     ZOOM_scanset scan;
1541
1542     if (!c->tasks || c->tasks->which != ZOOM_TASK_SCAN)
1543         return 0;
1544     scan = c->tasks->u.scan.scan;
1545
1546     if (res->entries && res->entries->nonsurrogateDiagnostics)
1547         response_diag(c, res->entries->nonsurrogateDiagnostics[0]);
1548     scan->scan_response = res;
1549     nmem_transfer (scan->odr->mem, nmem);
1550     if (res->stepSize)
1551         ZOOM_options_set_int (scan->options, "stepSize", *res->stepSize);
1552     if (res->positionOfTerm)
1553         ZOOM_options_set_int (scan->options, "position", *res->positionOfTerm);
1554     if (res->scanStatus)
1555         ZOOM_options_set_int (scan->options, "scanStatus", *res->scanStatus);
1556     if (res->numberOfEntriesReturned)
1557         ZOOM_options_set_int (scan->options, "number",
1558                               *res->numberOfEntriesReturned);
1559     nmem_destroy (nmem);
1560     return 1;
1561 }
1562
1563 static zoom_ret send_sort (ZOOM_connection c)
1564 {
1565     ZOOM_resultset  resultset;
1566
1567     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1568         return zoom_complete;
1569
1570     resultset = c->tasks->u.search.resultset;
1571
1572     if (c->error)
1573     {
1574         resultset->r_sort_spec = 0;
1575         return zoom_complete;
1576     }
1577     if (resultset->r_sort_spec)
1578     {
1579         Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_sortRequest);
1580         Z_SortRequest *req = apdu->u.sortRequest;
1581
1582         req->num_inputResultSetNames = 1;
1583         req->inputResultSetNames = (Z_InternationalString **)
1584             odr_malloc (c->odr_out, sizeof(*req->inputResultSetNames));
1585         req->inputResultSetNames[0] =
1586             odr_strdup (c->odr_out, resultset->setname);
1587         req->sortedResultSetName = odr_strdup (c->odr_out, resultset->setname);
1588         req->sortSequence = resultset->r_sort_spec;
1589         resultset->r_sort_spec = 0;
1590         return send_APDU (c, apdu);
1591     }
1592     return zoom_complete;
1593 }
1594
1595 static zoom_ret send_present (ZOOM_connection c)
1596 {
1597     Z_APDU *apdu = 0;
1598     Z_PresentRequest *req = 0;
1599     int i = 0;
1600     const char *syntax = 0;
1601     const char *elementSetName = 0;
1602     const char *schema = 0;
1603     ZOOM_resultset  resultset;
1604
1605     if (!c->tasks)
1606         return zoom_complete;
1607
1608     switch (c->tasks->which)
1609     {
1610     case ZOOM_TASK_SEARCH:
1611         resultset = c->tasks->u.search.resultset;
1612         break;
1613     case ZOOM_TASK_RETRIEVE:
1614         resultset = c->tasks->u.retrieve.resultset;
1615         resultset->start = c->tasks->u.retrieve.start;
1616         resultset->count = c->tasks->u.retrieve.count;
1617
1618         if (resultset->start >= resultset->size)
1619             return zoom_complete;
1620         if (resultset->start + resultset->count > resultset->size)
1621             resultset->count = resultset->size - resultset->start;
1622         break;
1623     default:
1624         return zoom_complete;
1625     }
1626
1627     syntax = ZOOM_resultset_option_get (resultset, "preferredRecordSyntax");
1628     elementSetName = ZOOM_resultset_option_get (resultset, "elementSetName");
1629     schema = ZOOM_resultset_option_get (resultset, "schema");
1630
1631     if (c->error)                  /* don't continue on error */
1632         return zoom_complete;
1633     if (resultset->start < 0)
1634         return zoom_complete;
1635     for (i = 0; i<resultset->count; i++)
1636     {
1637         ZOOM_record rec =
1638             record_cache_lookup (resultset, i + resultset->start);
1639         if (!rec)
1640             break;
1641     }
1642     if (i == resultset->count)
1643         return zoom_complete;
1644
1645     apdu = zget_APDU(c->odr_out, Z_APDU_presentRequest);
1646     req = apdu->u.presentRequest;
1647
1648     resultset->start += i;
1649     resultset->count -= i;
1650     *req->resultSetStartPoint = resultset->start + 1;
1651     *req->numberOfRecordsRequested = resultset->count;
1652     assert (*req->numberOfRecordsRequested > 0);
1653
1654     if (syntax && *syntax)
1655         req->preferredRecordSyntax =
1656             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1657
1658     if (schema && *schema)
1659     {
1660         Z_RecordComposition *compo = (Z_RecordComposition *)
1661             odr_malloc (c->odr_out, sizeof(*compo));
1662
1663         req->recordComposition = compo;
1664         compo->which = Z_RecordComp_complex;
1665         compo->u.complex = (Z_CompSpec *)
1666             odr_malloc(c->odr_out, sizeof(*compo->u.complex));
1667         compo->u.complex->selectAlternativeSyntax = (bool_t *)
1668             odr_malloc(c->odr_out, sizeof(bool_t));
1669         *compo->u.complex->selectAlternativeSyntax = 0;
1670
1671         compo->u.complex->generic = (Z_Specification *)
1672             odr_malloc(c->odr_out, sizeof(*compo->u.complex->generic));
1673
1674         compo->u.complex->generic->which = Z_Specification_oid;
1675         compo->u.complex->generic->u.oid = (Odr_oid *)
1676             yaz_str_to_z3950oid (c->odr_out, CLASS_SCHEMA, schema);
1677
1678         if (!compo->u.complex->generic->u.oid)
1679         {
1680             /* OID wasn't a schema! Try record syntax instead. */
1681
1682             compo->u.complex->generic->u.oid = (Odr_oid *)
1683                 yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, schema);
1684         }
1685         if (elementSetName && *elementSetName)
1686         {
1687             compo->u.complex->generic->elementSpec = (Z_ElementSpec *)
1688                 odr_malloc(c->odr_out, sizeof(Z_ElementSpec));
1689             compo->u.complex->generic->elementSpec->which =
1690                 Z_ElementSpec_elementSetName;
1691             compo->u.complex->generic->elementSpec->u.elementSetName =
1692                 odr_strdup (c->odr_out, elementSetName);
1693         }
1694         else
1695             compo->u.complex->generic->elementSpec = 0;
1696         compo->u.complex->num_dbSpecific = 0;
1697         compo->u.complex->dbSpecific = 0;
1698         compo->u.complex->num_recordSyntax = 0;
1699         compo->u.complex->recordSyntax = 0;
1700     }
1701     else if (elementSetName && *elementSetName)
1702     {
1703         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1704             odr_malloc (c->odr_out, sizeof(*esn));
1705         Z_RecordComposition *compo = (Z_RecordComposition *)
1706             odr_malloc (c->odr_out, sizeof(*compo));
1707
1708         esn->which = Z_ElementSetNames_generic;
1709         esn->u.generic = odr_strdup (c->odr_out, elementSetName);
1710         compo->which = Z_RecordComp_simple;
1711         compo->u.simple = esn;
1712         req->recordComposition = compo;
1713     }
1714     req->resultSetId = odr_strdup(c->odr_out, resultset->setname);
1715     return send_APDU (c, apdu);
1716 }
1717
1718 ZOOM_API(ZOOM_scanset)
1719 ZOOM_connection_scan (ZOOM_connection c, const char *start)
1720 {
1721     ZOOM_scanset scan = (ZOOM_scanset) xmalloc (sizeof(*scan));
1722
1723     scan->connection = c;
1724     scan->odr = odr_createmem (ODR_DECODE);
1725     scan->options = ZOOM_options_create_with_parent (c->options);
1726     scan->refcount = 1;
1727     scan->scan_response = 0;
1728
1729     if ((scan->termListAndStartPoint =
1730          p_query_scan(scan->odr, PROTO_Z3950, &scan->attributeSet,
1731                       start)))
1732     {
1733         ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_SCAN);
1734         task->u.scan.scan = scan;
1735
1736         (scan->refcount)++;
1737         if (!c->async)
1738         {
1739             while (ZOOM_event (1, &c))
1740                 ;
1741         }
1742     }
1743     return scan;
1744 }
1745
1746 ZOOM_API(void)
1747 ZOOM_scanset_destroy (ZOOM_scanset scan)
1748 {
1749     if (!scan)
1750         return;
1751     (scan->refcount)--;
1752     if (scan->refcount == 0)
1753     {
1754         odr_destroy (scan->odr);
1755
1756         ZOOM_options_destroy (scan->options);
1757         xfree (scan);
1758     }
1759 }
1760
1761 static zoom_ret send_package (ZOOM_connection c)
1762 {
1763     ZOOM_Event event;
1764     if (!c->tasks)
1765         return zoom_complete;
1766     assert (c->tasks->which == ZOOM_TASK_PACKAGE);
1767
1768     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
1769     ZOOM_connection_put_event (c, event);
1770
1771     return do_write_ex (c, c->tasks->u.package->buf_out,
1772                         c->tasks->u.package->len_out);
1773 }
1774
1775 static zoom_ret send_scan (ZOOM_connection c)
1776 {
1777     ZOOM_scanset scan;
1778     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_scanRequest);
1779     Z_ScanRequest *req = apdu->u.scanRequest;
1780     if (!c->tasks)
1781         return zoom_complete;
1782     assert (c->tasks->which == ZOOM_TASK_SCAN);
1783     scan = c->tasks->u.scan.scan;
1784
1785     req->termListAndStartPoint = scan->termListAndStartPoint;
1786     req->attributeSet = scan->attributeSet;
1787
1788     *req->numberOfTermsRequested =
1789         ZOOM_options_get_int(scan->options, "number", 10);
1790
1791     req->preferredPositionInResponse =
1792         odr_intdup (c->odr_out,
1793                     ZOOM_options_get_int(scan->options, "position", 1));
1794
1795     req->stepSize =
1796         odr_intdup (c->odr_out,
1797                     ZOOM_options_get_int(scan->options, "stepSize", 0));
1798
1799     req->databaseNames = set_DatabaseNames (c, scan->options,
1800                                             &req->num_databaseNames);
1801
1802     return send_APDU (c, apdu);
1803 }
1804
1805 ZOOM_API(size_t)
1806 ZOOM_scanset_size (ZOOM_scanset scan)
1807 {
1808     if (!scan || !scan->scan_response || !scan->scan_response->entries)
1809         return 0;
1810     return scan->scan_response->entries->num_entries;
1811 }
1812
1813 ZOOM_API(const char *)
1814 ZOOM_scanset_term (ZOOM_scanset scan, size_t pos,
1815                                int *occ, int *len)
1816 {
1817     const char *term = 0;
1818     size_t noent = ZOOM_scanset_size (scan);
1819     Z_ScanResponse *res = scan->scan_response;
1820
1821     *len = 0;
1822     *occ = 0;
1823     if (pos >= noent)
1824         return 0;
1825     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
1826     {
1827         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
1828
1829         if (t->term->which == Z_Term_general)
1830         {
1831             term = (const char *) t->term->u.general->buf;
1832             *len = t->term->u.general->len;
1833         }
1834         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
1835     }
1836     return term;
1837 }
1838
1839 ZOOM_API(const char *)
1840 ZOOM_scanset_option_get (ZOOM_scanset scan, const char *key)
1841 {
1842     return ZOOM_options_get (scan->options, key);
1843 }
1844
1845 ZOOM_API(void)
1846 ZOOM_scanset_option_set (ZOOM_scanset scan, const char *key,
1847                               const char *val)
1848 {
1849     ZOOM_options_set (scan->options, key, val);
1850 }
1851
1852 static Z_APDU *create_es_package (ZOOM_package p, int type)
1853 {
1854     const char *str;
1855     Z_APDU *apdu = zget_APDU(p->odr_out, Z_APDU_extendedServicesRequest);
1856     Z_ExtendedServicesRequest *req = apdu->u.extendedServicesRequest;
1857
1858     *req->function = Z_ExtendedServicesRequest_create;
1859
1860     str = ZOOM_options_get(p->options, "package-name");
1861     if (str && *str)
1862         req->packageName = nmem_strdup (p->odr_out->mem, str);
1863
1864     str = ZOOM_options_get(p->options, "user-id");
1865     if (str)
1866         req->userId = nmem_strdup (p->odr_out->mem, str);
1867
1868     req->packageType = yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
1869                                               type);
1870
1871     str = ZOOM_options_get(p->options, "function");
1872     if (str)
1873     {
1874         if (!strcmp (str, "create"))
1875             *req->function = 1;
1876         if (!strcmp (str, "delete"))
1877             *req->function = 2;
1878         if (!strcmp (str, "modify"))
1879             *req->function = 3;
1880     }
1881     return apdu;
1882 }
1883
1884 static const char *ill_array_lookup (void *clientData, const char *idx)
1885 {
1886     ZOOM_package p = (ZOOM_package) clientData;
1887     return ZOOM_options_get (p->options, idx+4);
1888 }
1889
1890 static Z_External *encode_ill_request (ZOOM_package p)
1891 {
1892     ODR out = p->odr_out;
1893     ILL_Request *req;
1894     Z_External *r = 0;
1895     struct ill_get_ctl ctl;
1896
1897     ctl.odr = p->odr_out;
1898     ctl.clientData = p;
1899     ctl.f = ill_array_lookup;
1900
1901     req = ill_get_ILLRequest(&ctl, "ill", 0);
1902
1903     if (!ill_Request (out, &req, 0, 0))
1904     {
1905         int ill_request_size;
1906         char *ill_request_buf = odr_getbuf (out, &ill_request_size, 0);
1907         if (ill_request_buf)
1908             odr_setbuf (out, ill_request_buf, ill_request_size, 1);
1909         return 0;
1910     }
1911     else
1912     {
1913         oident oid;
1914         int illRequest_size = 0;
1915         char *illRequest_buf = odr_getbuf (out, &illRequest_size, 0);
1916
1917         oid.proto = PROTO_GENERAL;
1918         oid.oclass = CLASS_GENERAL;
1919         oid.value = VAL_ISO_ILL_1;
1920
1921         r = (Z_External *) odr_malloc (out, sizeof(*r));
1922         r->direct_reference = odr_oiddup(out,oid_getoidbyent(&oid));
1923         r->indirect_reference = 0;
1924         r->descriptor = 0;
1925         r->which = Z_External_single;
1926
1927         r->u.single_ASN1_type = (Odr_oct *)
1928             odr_malloc (out, sizeof(*r->u.single_ASN1_type));
1929         r->u.single_ASN1_type->buf = (unsigned char*)
1930             odr_malloc (out, illRequest_size);
1931         r->u.single_ASN1_type->len = illRequest_size;
1932         r->u.single_ASN1_type->size = illRequest_size;
1933         memcpy (r->u.single_ASN1_type->buf, illRequest_buf, illRequest_size);
1934     }
1935     return r;
1936 }
1937
1938 static Z_ItemOrder *encode_item_order(ZOOM_package p)
1939 {
1940     Z_ItemOrder *req = (Z_ItemOrder *) odr_malloc (p->odr_out, sizeof(*req));
1941     const char *str;
1942
1943     req->which=Z_IOItemOrder_esRequest;
1944     req->u.esRequest = (Z_IORequest *)
1945         odr_malloc(p->odr_out,sizeof(Z_IORequest));
1946
1947     /* to keep part ... */
1948     req->u.esRequest->toKeep = (Z_IOOriginPartToKeep *)
1949         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartToKeep));
1950     req->u.esRequest->toKeep->supplDescription = 0;
1951     req->u.esRequest->toKeep->contact = (Z_IOContact *)
1952         odr_malloc (p->odr_out, sizeof(*req->u.esRequest->toKeep->contact));
1953
1954     str = ZOOM_options_get(p->options, "contact-name");
1955     req->u.esRequest->toKeep->contact->name = str ?
1956         nmem_strdup (p->odr_out->mem, str) : 0;
1957
1958     str = ZOOM_options_get(p->options, "contact-phone");
1959     req->u.esRequest->toKeep->contact->phone = str ?
1960         nmem_strdup (p->odr_out->mem, str) : 0;
1961
1962     str = ZOOM_options_get(p->options, "contact-email");
1963     req->u.esRequest->toKeep->contact->email = str ?
1964         nmem_strdup (p->odr_out->mem, str) : 0;
1965
1966     req->u.esRequest->toKeep->addlBilling = 0;
1967
1968     /* not to keep part ... */
1969     req->u.esRequest->notToKeep = (Z_IOOriginPartNotToKeep *)
1970         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartNotToKeep));
1971
1972     req->u.esRequest->notToKeep->resultSetItem = (Z_IOResultSetItem *)
1973         odr_malloc(p->odr_out, sizeof(Z_IOResultSetItem));
1974
1975     str = ZOOM_options_get(p->options, "itemorder-setname");
1976     if (!str)
1977         str = "default";
1978     req->u.esRequest->notToKeep->resultSetItem->resultSetId =
1979         nmem_strdup (p->odr_out->mem, str);
1980     req->u.esRequest->notToKeep->resultSetItem->item =
1981         (int *) odr_malloc(p->odr_out, sizeof(int));
1982
1983     str = ZOOM_options_get(p->options, "itemorder-item");
1984     *req->u.esRequest->notToKeep->resultSetItem->item =
1985         (str ? atoi(str) : 1);
1986
1987     req->u.esRequest->notToKeep->itemRequest = encode_ill_request(p);
1988
1989     return req;
1990 }
1991
1992 ZOOM_API(void)
1993     ZOOM_package_send (ZOOM_package p, const char *type)
1994 {
1995     Z_APDU *apdu = 0;
1996     ZOOM_connection c;
1997     if (!p)
1998         return;
1999     c = p->connection;
2000     odr_reset (p->odr_out);
2001     xfree (p->buf_out);
2002     p->buf_out = 0;
2003     if (!strcmp(type, "itemorder"))
2004     {
2005         Z_External *r;
2006         apdu = create_es_package (p, VAL_ITEMORDER);
2007         if (apdu)
2008         {
2009             r = (Z_External *) odr_malloc (p->odr_out, sizeof(*r));
2010
2011             r->direct_reference =
2012                 yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2013                                        VAL_ITEMORDER);
2014             r->descriptor = 0;
2015             r->which = Z_External_itemOrder;
2016             r->indirect_reference = 0;
2017             r->u.itemOrder = encode_item_order (p);
2018
2019             apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2020         }
2021     }
2022     if (apdu)
2023     {
2024         if (encode_APDU(p->connection, apdu, p->odr_out) == 0)
2025         {
2026             char *buf;
2027
2028             ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_PACKAGE);
2029             task->u.package = p;
2030             buf = odr_getbuf(p->odr_out, &p->len_out, 0);
2031             p->buf_out = (char *) xmalloc (p->len_out);
2032             memcpy (p->buf_out, buf, p->len_out);
2033
2034             (p->refcount)++;
2035             if (!c->async)
2036             {
2037                 while (ZOOM_event (1, &c))
2038                     ;
2039             }
2040         }
2041     }
2042 }
2043
2044 ZOOM_API(ZOOM_package)
2045     ZOOM_connection_package (ZOOM_connection c, ZOOM_options options)
2046 {
2047     ZOOM_package p = (ZOOM_package) xmalloc (sizeof(*p));
2048
2049     p->connection = c;
2050     p->odr_out = odr_createmem (ODR_ENCODE);
2051     p->options = ZOOM_options_create_with_parent2 (options, c->options);
2052     p->refcount = 1;
2053     p->buf_out = 0;
2054     p->len_out = 0;
2055     return p;
2056 }
2057
2058 ZOOM_API(void)
2059     ZOOM_package_destroy(ZOOM_package p)
2060 {
2061     if (!p)
2062         return;
2063     (p->refcount)--;
2064     if (p->refcount == 0)
2065     {
2066         odr_destroy (p->odr_out);
2067         xfree (p->buf_out);
2068
2069         ZOOM_options_destroy (p->options);
2070         xfree (p);
2071     }
2072 }
2073
2074 ZOOM_API(const char *)
2075 ZOOM_package_option_get (ZOOM_package p, const char *key)
2076 {
2077     return ZOOM_options_get (p->options, key);
2078 }
2079
2080 #if HAVE_GSOAP
2081 static zoom_ret ZOOM_srw_search(ZOOM_connection c, ZOOM_resultset r,
2082                                 const char *cql)
2083 {
2084     int ret;
2085     struct xcql__operandType *xQuery = 0;
2086     char *action = 0;
2087     xsd__integer startRecord = r->start + 1;
2088     xsd__integer maximumRecord = r->count;
2089     const char *schema = ZOOM_resultset_option_get (r, "schema");
2090     struct zs__searchRetrieveResponse res;
2091     xsd__string recordPacking = 0;
2092
2093
2094     if (!schema)
2095         schema = "http://www.loc.gov/marcxml/";
2096
2097     ret = soap_call_zs__searchRetrieveRequest(c->soap, c->host_port,
2098                                               action,
2099                                               &r->z_query->u.type_104->u.cql,
2100                                               xQuery,
2101                                               0, 0,
2102                                               &startRecord, &maximumRecord,
2103                                               (char **) &schema,
2104                                               &recordPacking,
2105                                               &res);
2106     if (ret != SOAP_OK)
2107     {
2108         const char **s = soap_faultdetail(c->soap);
2109         xfree (c->addinfo);
2110         c->addinfo = 0;
2111         if (s && *s)
2112             c->addinfo = xstrdup(*s);
2113         c->diagset = "SOAP";
2114         c->error = ret;
2115     }
2116     else
2117     {
2118         if (res.diagnostics.__sizeDiagnostics > 0)
2119         {
2120             int i = 0;
2121             xfree (c->addinfo);
2122             c->addinfo = 0;
2123             c->diagset = "SRW";
2124             c->error = res.diagnostics.diagnostic[i]->code;
2125             if (res.diagnostics.diagnostic[i]->details)
2126                 c->addinfo =
2127                     xstrdup(res.diagnostics.diagnostic[i]->details);
2128
2129         }
2130         else
2131         {
2132             int i;
2133             r->size = res.numberOfRecords;
2134             if (res.resultSetId)
2135                 r->setname = xstrdup(res.resultSetId);
2136             for (i = 0; i < res.records.__sizeRecords; i++)
2137             {
2138                 char *rdata = res.records.record[i]->recordData;
2139                 if (rdata)
2140                 {
2141                     Z_NamePlusRecord *npr =
2142                         odr_malloc(r->odr, sizeof(*npr));
2143                     Z_External *ext =
2144                         z_ext_record(r->odr, VAL_TEXT_XML,
2145                                      rdata, strlen(rdata));
2146                     npr->databaseName = 0;
2147                     npr->which = Z_NamePlusRecord_databaseRecord;
2148                     npr->u.databaseRecord = ext;
2149                     record_cache_add (r, npr, r->start + i);
2150                 }
2151             }
2152         }
2153     }
2154     return zoom_complete;
2155 }
2156 #endif
2157
2158 ZOOM_API(void)
2159 ZOOM_package_option_set (ZOOM_package p, const char *key,
2160                               const char *val)
2161 {
2162     ZOOM_options_set (p->options, key, val);
2163 }
2164
2165 static int ZOOM_connection_exec_task (ZOOM_connection c)
2166 {
2167     ZOOM_task task = c->tasks;
2168     zoom_ret ret = zoom_complete;
2169
2170     if (!task)
2171     {
2172         yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task task=<null>");
2173         return 0;
2174     }
2175     yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task type=%d run=%d",
2176              task->which, task->running);
2177     if (c->error != ZOOM_ERROR_NONE)
2178     {
2179         yaz_log (LOG_DEBUG, "remove tasks because of error = %d", c->error);
2180         ZOOM_connection_remove_tasks (c);
2181         return 0;
2182     }
2183     if (task->running)
2184     {
2185         yaz_log (LOG_DEBUG, "task already running");
2186         return 0;
2187     }
2188     task->running = 1;
2189     ret = zoom_complete;
2190 #if 0
2191     if (c->proto == PROTO_SRW)
2192     {
2193         ZOOM_resultset resultset;
2194         switch (task->which)
2195         {
2196         case ZOOM_TASK_SEARCH:
2197             resultset = c->tasks->u.search.resultset;
2198             if (resultset->z_query &&
2199                 resultset->z_query->which == Z_Query_type_104
2200                 && resultset->z_query->u.type_104->which == Z_External_CQL)
2201                 ret = ZOOM_srw_search(c, resultset,
2202                                       resultset->z_query->u.type_104->u.cql);
2203             break;
2204         case ZOOM_TASK_RETRIEVE:
2205             resultset = c->tasks->u.retrieve.resultset;
2206             resultset->start = c->tasks->u.retrieve.start;
2207             resultset->count = c->tasks->u.retrieve.count;
2208
2209             if (resultset->start >= resultset->size)
2210                 return zoom_complete;
2211             if (resultset->start + resultset->count > resultset->size)
2212                 resultset->count = resultset->size - resultset->start;
2213
2214             if (resultset->z_query &&
2215                 resultset->z_query->which == Z_Query_type_104
2216                 && resultset->z_query->u.type_104->which == Z_External_CQL)
2217                 ret = ZOOM_srw_search(c, resultset,
2218                                       resultset->z_query->u.type_104->u.cql);
2219             break;
2220         }
2221 #endif
2222     if (c->cs || task->which == ZOOM_TASK_CONNECT)
2223     {
2224         switch (task->which)
2225         {
2226         case ZOOM_TASK_SEARCH:
2227             if (c->proto == PROTO_SRW)
2228                 ret = ZOOM_connection_srw_send_search(c);
2229             else
2230                 ret = ZOOM_connection_send_search(c);
2231             break;
2232         case ZOOM_TASK_RETRIEVE:
2233             ret = send_present (c);
2234             break;
2235         case ZOOM_TASK_CONNECT:
2236             ret = do_connect(c);
2237             break;
2238         case ZOOM_TASK_SCAN:
2239             ret = send_scan(c);
2240             break;
2241         case ZOOM_TASK_PACKAGE:
2242             ret = send_package(c);
2243             break;
2244         }
2245     }
2246     else
2247     {
2248         yaz_log (LOG_DEBUG, "remove tasks because no connection exist");
2249         ZOOM_connection_remove_tasks (c);
2250     }
2251     if (ret == zoom_complete)
2252     {
2253         yaz_log (LOG_DEBUG, "task removed (complete)");
2254         ZOOM_connection_remove_task (c);
2255         return 0;
2256     }
2257     yaz_log (LOG_DEBUG, "task pending");
2258     return 1;
2259 }
2260
2261 static zoom_ret send_sort_present (ZOOM_connection c)
2262 {
2263     zoom_ret r = send_sort (c);
2264     if (r == zoom_complete)
2265         r = send_present (c);
2266     return r;
2267 }
2268
2269 static int es_response (ZOOM_connection c,
2270                         Z_ExtendedServicesResponse *res)
2271 {
2272     if (!c->tasks || c->tasks->which != ZOOM_TASK_PACKAGE)
2273         return 0;
2274     if (res->diagnostics && res->num_diagnostics > 0)
2275         response_diag(c, res->diagnostics[0]);
2276     if (res->taskPackage &&
2277         res->taskPackage->which == Z_External_extendedService)
2278     {
2279         Z_TaskPackage *taskPackage = res->taskPackage->u.extendedService;
2280         Odr_oct *id = taskPackage->targetReference;
2281
2282         if (id)
2283             ZOOM_options_setl (c->tasks->u.package->options,
2284                                "targetReference", (char*) id->buf, id->len);
2285     }
2286     return 1;
2287 }
2288
2289
2290 static void handle_apdu (ZOOM_connection c, Z_APDU *apdu)
2291 {
2292     Z_InitResponse *initrs;
2293
2294     c->mask = 0;
2295     yaz_log (LOG_DEBUG, "handle_apdu type=%d", apdu->which);
2296     switch(apdu->which)
2297     {
2298     case Z_APDU_initResponse:
2299         initrs = apdu->u.initResponse;
2300         ZOOM_connection_option_set(c, "targetImplementationId",
2301                                    initrs->implementationId ?
2302                                    initrs->implementationId : "");
2303         ZOOM_connection_option_set(c, "targetImplementationName",
2304                                    initrs->implementationName ?
2305                                    initrs->implementationName : "");
2306         ZOOM_connection_option_set(c, "targetImplementationVersion",
2307                                    initrs->implementationVersion ?
2308                                    initrs->implementationVersion : "");
2309         if (!*initrs->result)
2310         {
2311             set_ZOOM_error(c, ZOOM_ERROR_INIT, 0);
2312         }
2313         else
2314         {
2315             char *cookie =
2316                 yaz_oi_get_string_oidval (&apdu->u.initResponse->otherInfo,
2317                                           VAL_COOKIE, 1, 0);
2318             xfree (c->cookie_in);
2319             c->cookie_in = 0;
2320             if (cookie)
2321                 c->cookie_in = xstrdup(cookie);
2322             if (ODR_MASK_GET(initrs->options, Z_Options_namedResultSets) &&
2323                 ODR_MASK_GET(initrs->protocolVersion, Z_ProtocolVersion_3))
2324                 c->support_named_resultsets = 1;
2325             if (c->tasks)
2326             {
2327                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2328                 ZOOM_connection_remove_task (c);
2329             }
2330             ZOOM_connection_exec_task (c);
2331         }
2332         if (ODR_MASK_GET(initrs->options, Z_Options_negotiationModel))
2333         {
2334             NMEM tmpmem = nmem_create();
2335             Z_CharSetandLanguageNegotiation *p =
2336                 yaz_get_charneg_record(initrs->otherInfo);
2337
2338             if (p)
2339             {
2340                 char *charset=NULL, *lang=NULL;
2341                 int sel;
2342
2343                 yaz_get_response_charneg(tmpmem, p, &charset, &lang, &sel);
2344                 yaz_log(LOG_DEBUG, "Target accepted: charset %s, "
2345                         "language %s, select %d",
2346                         charset ? charset : "none", lang ? lang : "none", sel);
2347                 if (charset)
2348                     ZOOM_connection_option_set (c, "negotiation-charset",
2349                                                 charset);
2350                 if (lang)
2351                     ZOOM_connection_option_set (c, "negotiation-lang",
2352                                                 lang);
2353                 nmem_destroy(tmpmem);
2354             }
2355         }
2356         break;
2357     case Z_APDU_searchResponse:
2358         handle_search_response (c, apdu->u.searchResponse);
2359         if (send_sort_present (c) == zoom_complete)
2360             ZOOM_connection_remove_task (c);
2361         break;
2362     case Z_APDU_presentResponse:
2363         handle_present_response (c, apdu->u.presentResponse);
2364         if (send_present (c) == zoom_complete)
2365             ZOOM_connection_remove_task (c);
2366         break;
2367     case Z_APDU_sortResponse:
2368         sort_response (c, apdu->u.sortResponse);
2369         if (send_present (c) == zoom_complete)
2370             ZOOM_connection_remove_task (c);
2371         break;
2372     case Z_APDU_scanResponse:
2373         scan_response (c, apdu->u.scanResponse);
2374         ZOOM_connection_remove_task (c);
2375         break;
2376     case Z_APDU_extendedServicesResponse:
2377         es_response (c, apdu->u.extendedServicesResponse);
2378         ZOOM_connection_remove_task (c);
2379         break;
2380     case Z_APDU_close:
2381         if (c->reconnect_ok)
2382         {
2383             do_close(c);
2384             c->tasks->running = 0;
2385             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2386         }
2387         else
2388         {
2389             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2390             do_close(c);
2391         }
2392         break;
2393     default:
2394         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2395         do_close(c);
2396     }
2397 }
2398
2399 static void handle_http(ZOOM_connection c, Z_HTTP_Response *hres)
2400 {
2401     c->mask = 0;
2402     yaz_log (LOG_DEBUG, "handle_http");
2403     ZOOM_connection_remove_task(c);
2404 }
2405
2406 static int do_read (ZOOM_connection c)
2407 {
2408     int r;
2409     ZOOM_Event event;
2410
2411     event = ZOOM_Event_create (ZOOM_EVENT_RECV_DATA);
2412     ZOOM_connection_put_event (c, event);
2413
2414     yaz_log (LOG_DEBUG, "do_read len=%d", c->len_in);
2415
2416     r = cs_get (c->cs, &c->buf_in, &c->len_in);
2417     if (r == 1)
2418         return 0;
2419     if (r <= 0)
2420     {
2421         if (c->reconnect_ok)
2422         {
2423             do_close (c);
2424             c->reconnect_ok = 0;
2425             yaz_log (LOG_DEBUG, "reconnect read");
2426             c->tasks->running = 0;
2427             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2428         }
2429         else
2430         {
2431             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2432             do_close (c);
2433         }
2434     }
2435     else
2436     {
2437         Z_GDU *gdu;
2438         ZOOM_Event event;
2439         odr_reset (c->odr_in);
2440         odr_setbuf (c->odr_in, c->buf_in, r, 0);
2441         event = ZOOM_Event_create (ZOOM_EVENT_RECV_APDU);
2442         ZOOM_connection_put_event (c, event);
2443
2444         if (!z_GDU (c->odr_in, &gdu, 0, 0))
2445         {
2446             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2447             do_close (c);
2448         }
2449         else if (gdu->which == Z_GDU_Z3950)
2450             handle_apdu (c, gdu->u.z3950);
2451         else if (gdu->which == Z_GDU_HTTP_Response)
2452             handle_http (c, gdu->u.HTTP_Response);
2453         c->reconnect_ok = 0;
2454     }
2455     return 1;
2456 }
2457
2458 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out)
2459 {
2460     int r;
2461     ZOOM_Event event;
2462
2463     event = ZOOM_Event_create(ZOOM_EVENT_SEND_DATA);
2464     ZOOM_connection_put_event (c, event);
2465
2466     yaz_log (LOG_DEBUG, "do_write_ex len=%d", len_out);
2467     if ((r=cs_put (c->cs, buf_out, len_out)) < 0)
2468     {
2469         if (c->reconnect_ok)
2470         {
2471             do_close (c);
2472             c->reconnect_ok = 0;
2473             yaz_log (LOG_DEBUG, "reconnect write");
2474             c->tasks->running = 0;
2475             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2476             return zoom_complete;
2477         }
2478         if (c->state == STATE_CONNECTING)
2479             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2480         else
2481             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2482         do_close (c);
2483         return zoom_complete;
2484     }
2485     else if (r == 1)
2486     {
2487         c->mask = ZOOM_SELECT_EXCEPT;
2488         if (c->cs->io_pending & CS_WANT_WRITE)
2489             c->mask += ZOOM_SELECT_WRITE;
2490         if (c->cs->io_pending & CS_WANT_READ)
2491             c->mask += ZOOM_SELECT_READ;
2492         yaz_log (LOG_DEBUG, "do_write_ex 1 mask=%d", c->mask);
2493     }
2494     else
2495     {
2496         c->mask = ZOOM_SELECT_READ|ZOOM_SELECT_EXCEPT;
2497         yaz_log (LOG_DEBUG, "do_write_ex 2 mask=%d", c->mask);
2498     }
2499     return zoom_pending;
2500 }
2501
2502 static zoom_ret do_write(ZOOM_connection c)
2503 {
2504     return do_write_ex (c, c->buf_out, c->len_out);
2505 }
2506
2507
2508 ZOOM_API(const char *)
2509 ZOOM_connection_option_get (ZOOM_connection c, const char *key)
2510 {
2511     return ZOOM_options_get (c->options, key);
2512 }
2513
2514 ZOOM_API(void)
2515 ZOOM_connection_option_set (ZOOM_connection c, const char *key,
2516                                   const char *val)
2517 {
2518     ZOOM_options_set (c->options, key, val);
2519 }
2520
2521 ZOOM_API(const char *)
2522 ZOOM_resultset_option_get (ZOOM_resultset r, const char *key)
2523 {
2524     return ZOOM_options_get (r->options, key);
2525 }
2526
2527 ZOOM_API(void)
2528 ZOOM_resultset_option_set (ZOOM_resultset r, const char *key,
2529                                   const char *val)
2530 {
2531     ZOOM_options_set (r->options, key, val);
2532 }
2533
2534
2535 ZOOM_API(int)
2536 ZOOM_connection_errcode (ZOOM_connection c)
2537 {
2538     return ZOOM_connection_error (c, 0, 0);
2539 }
2540
2541 ZOOM_API(const char *)
2542 ZOOM_connection_errmsg (ZOOM_connection c)
2543 {
2544     const char *msg;
2545     ZOOM_connection_error (c, &msg, 0);
2546     return msg;
2547 }
2548
2549 ZOOM_API(const char *)
2550 ZOOM_connection_addinfo (ZOOM_connection c)
2551 {
2552     const char *addinfo;
2553     ZOOM_connection_error (c, 0, &addinfo);
2554     return addinfo;
2555 }
2556
2557 ZOOM_API(const char *)
2558 ZOOM_diag_str (int error)
2559 {
2560     switch (error)
2561     {
2562     case ZOOM_ERROR_NONE:
2563         return "No error";
2564     case ZOOM_ERROR_CONNECT:
2565         return "Connect failed";
2566     case ZOOM_ERROR_MEMORY:
2567         return "Out of memory";
2568     case ZOOM_ERROR_ENCODE:
2569         return "Encoding failed";
2570     case ZOOM_ERROR_DECODE:
2571         return "Decoding failed";
2572     case ZOOM_ERROR_CONNECTION_LOST:
2573         return "Connection lost";
2574     case ZOOM_ERROR_INIT:
2575         return "Init rejected";
2576     case ZOOM_ERROR_INTERNAL:
2577         return "Internal failure";
2578     case ZOOM_ERROR_TIMEOUT:
2579         return "Timeout";
2580     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
2581         return "Unsupported protocol";
2582     default:
2583         return diagbib1_str (error);
2584     }
2585 }
2586
2587 ZOOM_API(int)
2588 ZOOM_connection_error_x (ZOOM_connection c, const char **cp,
2589                          const char **addinfo, const char **diagset)
2590 {
2591     int error = c->error;
2592     if (cp)
2593     {
2594         if (!c->diagset)
2595             *cp = ZOOM_diag_str(error);
2596 #if HAVE_GSOAP
2597         else if (!strcmp(c->diagset, "SRW"))
2598             *cp = yaz_srw_diag_str(error);
2599         else if (c->soap && !strcmp(c->diagset, "SOAP"))
2600         {
2601             const char **s = soap_faultstring(c->soap);
2602             if (s && *s)
2603                 *cp = *s;
2604             else
2605                 *cp = "unknown";
2606         }
2607 #endif
2608         else
2609             *cp = ZOOM_diag_str(error);
2610     }
2611     if (addinfo)
2612         *addinfo = c->addinfo ? c->addinfo : "";
2613     if (diagset)
2614         *diagset = c->diagset ? c->diagset : "";
2615     return c->error;
2616 }
2617
2618 ZOOM_API(int)
2619 ZOOM_connection_error (ZOOM_connection c, const char **cp,
2620                        const char **addinfo)
2621 {
2622     return ZOOM_connection_error_x(c, cp, addinfo, 0);
2623 }
2624
2625 static int ZOOM_connection_do_io(ZOOM_connection c, int mask)
2626 {
2627     ZOOM_Event event = 0;
2628     int r = cs_look(c->cs);
2629     yaz_log (LOG_DEBUG, "ZOOM_connection_do_io c=%p mask=%d cs_look=%d",
2630              c, mask, r);
2631
2632     if (r == CS_NONE)
2633     {
2634         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2635         set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2636         do_close (c);
2637         ZOOM_connection_put_event (c, event);
2638     }
2639     else if (r == CS_CONNECT)
2640     {
2641         int ret;
2642         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2643
2644         ret = cs_rcvconnect (c->cs);
2645         yaz_log (LOG_DEBUG, "cs_rcvconnect returned %d", ret);
2646         if (ret == 1)
2647         {
2648             c->mask = ZOOM_SELECT_EXCEPT;
2649             if (c->cs->io_pending & CS_WANT_WRITE)
2650                 c->mask += ZOOM_SELECT_WRITE;
2651             if (c->cs->io_pending & CS_WANT_READ)
2652                 c->mask += ZOOM_SELECT_READ;
2653             ZOOM_connection_put_event (c, event);
2654         }
2655         else if (ret == 0)
2656         {
2657             ZOOM_connection_put_event (c, event);
2658             if (c->proto == PROTO_Z3950)
2659                 ZOOM_connection_send_init(c);
2660             else
2661             {
2662                 /* no init request for SRW .. */
2663                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2664                 ZOOM_connection_remove_task (c);
2665                 c->mask = 0;
2666                 ZOOM_connection_exec_task (c);
2667             }
2668             c->state = STATE_ESTABLISHED;
2669         }
2670         else
2671         {
2672             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2673             do_close (c);
2674             ZOOM_connection_put_event (c, event);
2675         }
2676     }
2677     else
2678     {
2679         if (mask & ZOOM_SELECT_READ)
2680             do_read (c);
2681         if (c->cs && (mask & ZOOM_SELECT_WRITE))
2682             do_write (c);
2683     }
2684     return 1;
2685 }
2686
2687 ZOOM_API(int)
2688 ZOOM_connection_last_event(ZOOM_connection cs)
2689 {
2690     if (!cs)
2691         return ZOOM_EVENT_NONE;
2692     return cs->last_event;
2693 }
2694
2695 ZOOM_API(int)
2696 ZOOM_event (int no, ZOOM_connection *cs)
2697 {
2698     int timeout = 5000;
2699 #if HAVE_SYS_POLL_H
2700     struct pollfd pollfds[1024];
2701     ZOOM_connection poll_cs[1024];
2702 #else
2703     struct timeval tv;
2704     fd_set input, output, except;
2705 #endif
2706     int i, r, nfds;
2707     int max_fd = 0;
2708
2709     for (i = 0; i<no; i++)
2710     {
2711         ZOOM_connection c = cs[i];
2712         ZOOM_Event event;
2713         if (c && (event = ZOOM_connection_get_event(c)))
2714         {
2715             ZOOM_Event_destroy (event);
2716             return i+1;
2717         }
2718     }
2719     for (i = 0; i<no; i++)
2720     {
2721         ZOOM_connection c = cs[i];
2722         ZOOM_Event event;
2723         if (c && ZOOM_connection_exec_task (c))
2724         {
2725             if ((event = ZOOM_connection_get_event(c)))
2726             {
2727                 ZOOM_Event_destroy (event);
2728                 return i+1;
2729             }
2730         }
2731     }
2732 #if HAVE_SYS_POLL_H
2733
2734 #else
2735     FD_ZERO (&input);
2736     FD_ZERO (&output);
2737     FD_ZERO (&except);
2738 #endif
2739     nfds = 0;
2740     for (i = 0; i<no; i++)
2741     {
2742         ZOOM_connection c = cs[i];
2743         int fd, mask;
2744         int this_timeout;
2745
2746         if (!c)
2747             continue;
2748         fd = z3950_connection_socket(c);
2749         mask = z3950_connection_mask(c);
2750
2751         if (fd == -1)
2752             continue;
2753         if (max_fd < fd)
2754             max_fd = fd;
2755
2756         this_timeout = ZOOM_options_get_int (c->options, "timeout", -1);
2757         if (this_timeout != -1 && this_timeout < timeout)
2758             timeout = this_timeout;
2759 #if HAVE_SYS_POLL_H
2760         if (mask)
2761         {
2762             short poll_events = 0;
2763
2764             if (mask & ZOOM_SELECT_READ)
2765                 poll_events += POLLIN;
2766             if (mask & ZOOM_SELECT_WRITE)
2767                 poll_events += POLLOUT;
2768             if (mask & ZOOM_SELECT_EXCEPT)
2769                 poll_events += POLLERR;
2770             pollfds[nfds].fd = fd;
2771             pollfds[nfds].events = poll_events;
2772             pollfds[nfds].revents = 0;
2773             poll_cs[nfds] = c;
2774             nfds++;
2775         }
2776 #else
2777         if (mask & ZOOM_SELECT_READ)
2778         {
2779             FD_SET (fd, &input);
2780             nfds++;
2781         }
2782         if (mask & ZOOM_SELECT_WRITE)
2783         {
2784             FD_SET (fd, &output);
2785             nfds++;
2786         }
2787         if (mask & ZOOM_SELECT_EXCEPT)
2788         {
2789             FD_SET (fd, &except);
2790             nfds++;
2791         }
2792 #endif
2793     }
2794     if (timeout >= 5000)
2795         timeout = 30;
2796
2797     if (!nfds)
2798         return 0;
2799
2800 #if HAVE_SYS_POLL_H
2801     r = poll (pollfds, nfds, timeout * 1000);
2802     for (i = 0; i<nfds; i++)
2803     {
2804         ZOOM_connection c = poll_cs[i];
2805         if (r && c->mask)
2806         {
2807             int mask = 0;
2808             if (pollfds[i].revents & POLLIN)
2809                 mask += ZOOM_SELECT_READ;
2810             if (pollfds[i].revents & POLLOUT)
2811                 mask += ZOOM_SELECT_WRITE;
2812             if (pollfds[i].revents & POLLERR)
2813                 mask += ZOOM_SELECT_EXCEPT;
2814             if (mask)
2815                 ZOOM_connection_do_io(c, mask);
2816         }
2817         else if (r == 0 && c->mask)
2818         {
2819             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
2820             /* timeout and this connection was waiting */
2821             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
2822             do_close (c);
2823             ZOOM_connection_put_event(c, event);
2824         }
2825     }
2826 #else
2827     tv.tv_sec = timeout;
2828     tv.tv_usec = 0;
2829     yaz_log (LOG_DEBUG, "select start");
2830     r = select (max_fd+1, &input, &output, &except, &tv);
2831     yaz_log (LOG_DEBUG, "select stop, returned r=%d", r);
2832     for (i = 0; i<no; i++)
2833     {
2834         ZOOM_connection c = cs[i];
2835         int fd, mask;
2836
2837         if (!c)
2838             continue;
2839         fd = z3950_connection_socket(c);
2840         mask = 0;
2841         if (r && c->mask)
2842         {
2843             /* no timeout and real socket */
2844             if (FD_ISSET(fd, &input))
2845                 mask += ZOOM_SELECT_READ;
2846             if (FD_ISSET(fd, &output))
2847                 mask += ZOOM_SELECT_WRITE;
2848             if (FD_ISSET(fd, &except))
2849                 mask += ZOOM_SELECT_EXCEPT;
2850             if (mask)
2851                 ZOOM_connection_do_io(c, mask);
2852         }
2853         if (r == 0 && c->mask)
2854         {
2855             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
2856             /* timeout and this connection was waiting */
2857             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
2858             do_close (c);
2859             yaz_log (LOG_DEBUG, "timeout");
2860             ZOOM_connection_put_event(c, event);
2861         }
2862     }
2863 #endif
2864     for (i = 0; i<no; i++)
2865     {
2866         ZOOM_connection c = cs[i];
2867         ZOOM_Event event;
2868         if (c && (event = ZOOM_connection_get_event(c)))
2869         {
2870             ZOOM_Event_destroy (event);
2871             return i+1;
2872         }
2873     }
2874     return 0;
2875 }