zoom/zoom-c.c

   1 /*
   2  * $Id: zoom-c.c,v 1.44 2002-09-13 08:57:03 adam Exp $
   3  *
   4  * ZOOM layer for C, connections, result sets, queries.
   5  */
   6 #include <assert.h>
   7 #include <yaz/xmalloc.h>
   8 #include <yaz/otherinfo.h>
   9 #include <yaz/log.h>
  10 #include <yaz/pquery.h>
  11 #include <yaz/diagbib1.h>
  12 #include <yaz/charneg.h>
  13 #include <yaz/ill.h>
  14
  15 #include "zoom-p.h"
  16
  17 #if HAVE_SYS_POLL_H
  18 #include <sys/poll.h>
  19 #endif
  20
  21 static int ZOOM_connection_send_init (ZOOM_connection c);
  22 static int do_write_ex (ZOOM_connection c, char *buf_out, int len_out);
  23
  24 static ZOOM_Event ZOOM_Event_create (int kind)
  25 {
  26     ZOOM_Event event = (ZOOM_Event) xmalloc (sizeof(*event));
  27     event->kind = kind;
  28     event->next = 0;
  29     event->prev = 0;
  30     return event;
  31 }
  32
  33 static void ZOOM_Event_destroy (ZOOM_Event event)
  34 {
  35     xfree (event);
  36 }
  37
  38 static void ZOOM_connection_put_event (ZOOM_connection c, ZOOM_Event event)
  39 {
  40     if (c->m_queue_back)
  41     {
  42         c->m_queue_back->prev = event;
  43         assert (c->m_queue_front);
  44     }
  45     else
  46     {
  47         assert (!c->m_queue_front);
  48         c->m_queue_front = event;
  49     }
  50     event->next = c->m_queue_back;
  51     event->prev = 0;
  52     c->m_queue_back = event;
  53 }
  54
  55 static ZOOM_Event ZOOM_connection_get_event(ZOOM_connection c)
  56 {
  57     ZOOM_Event event = c->m_queue_front;
  58     if (!event)
  59         return 0;
  60     assert (c->m_queue_back);
  61     c->m_queue_front = event->prev;
  62     if (c->m_queue_front)
  63     {
  64         assert (c->m_queue_back);
  65         c->m_queue_front->next = 0;
  66     }
  67     else
  68         c->m_queue_back = 0;
  69     c->last_event = event->kind;
  70     return event;
  71 }
  72
  73 static void clear_error (ZOOM_connection c)
  74 {
  75
  76     switch (c->error)
  77     {
  78     case ZOOM_ERROR_CONNECT:
  79     case ZOOM_ERROR_MEMORY:
  80     case ZOOM_ERROR_DECODE:
  81     case ZOOM_ERROR_CONNECTION_LOST:
  82     case ZOOM_ERROR_INIT:
  83     case ZOOM_ERROR_INTERNAL:
  84         break;
  85     default:
  86         c->error = ZOOM_ERROR_NONE;
  87         xfree (c->addinfo);
  88         c->addinfo = 0;
  89     }
  90 }
  91
  92 ZOOM_task ZOOM_connection_add_task (ZOOM_connection c, int which)
  93 {
  94     ZOOM_task *taskp = &c->tasks;
  95     while (*taskp)
  96         taskp = &(*taskp)->next;
  97     *taskp = (ZOOM_task) xmalloc (sizeof(**taskp));
  98     (*taskp)->running = 0;
  99     (*taskp)->which = which;
 100     (*taskp)->next = 0;
 101     clear_error (c);
 102     return *taskp;
 103 }
 104
 105 ZOOM_task ZOOM_connection_insert_task (ZOOM_connection c, int which)
 106 {
 107     ZOOM_task task = (ZOOM_task) xmalloc (sizeof(*task));
 108
 109     task->next = c->tasks;
 110     c->tasks = task;
 111
 112     task->running = 0;
 113     task->which = which;
 114     clear_error (c);
 115     return task;
 116 }
 117
 118 void ZOOM_connection_remove_task (ZOOM_connection c)
 119 {
 120     ZOOM_task task = c->tasks;
 121
 122     if (task)
 123     {
 124         c->tasks = task->next;
 125         switch (task->which)
 126         {
 127         case ZOOM_TASK_SEARCH:
 128             ZOOM_resultset_destroy (task->u.search.resultset);
 129             break;
 130         case ZOOM_TASK_RETRIEVE:
 131             ZOOM_resultset_destroy (task->u.retrieve.resultset);
 132             break;
 133         case ZOOM_TASK_CONNECT:
 134             break;
 135         case ZOOM_TASK_SCAN:
 136             ZOOM_scanset_destroy (task->u.scan.scan);
 137             break;
 138         case ZOOM_TASK_PACKAGE:
 139             ZOOM_package_destroy (task->u.package);
 140             break;
 141         default:
 142             assert (0);
 143         }
 144         xfree (task);
 145     }
 146 }
 147
 148 void ZOOM_connection_remove_tasks (ZOOM_connection c)
 149 {
 150     while (c->tasks)
 151         ZOOM_connection_remove_task(c);
 152 }
 153
 154 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos);
 155
 156 ZOOM_API(ZOOM_connection)
 157 ZOOM_connection_create (ZOOM_options options)
 158 {
 159     ZOOM_connection c = (ZOOM_connection) xmalloc (sizeof(*c));
 160
 161     c->cs = 0;
 162     c->mask = 0;
 163     c->reconnect_ok = 0;
 164     c->state = STATE_IDLE;
 165     c->error = ZOOM_ERROR_NONE;
 166     c->addinfo = 0;
 167     c->buf_in = 0;
 168     c->len_in = 0;
 169     c->buf_out = 0;
 170     c->len_out = 0;
 171     c->resultsets = 0;
 172
 173     c->options = ZOOM_options_create_with_parent(options);
 174
 175     c->host_port = 0;
 176     c->proxy = 0;
 177
 178     c->charset = c->lang = 0;
 179
 180     c->cookie_out = 0;
 181     c->cookie_in = 0;
 182     c->client_IP = 0;
 183     c->tasks = 0;
 184
 185     c->odr_in = odr_createmem (ODR_DECODE);
 186     c->odr_out = odr_createmem (ODR_ENCODE);
 187
 188     c->async = 0;
 189     c->support_named_resultsets = 0;
 190     c->last_event = ZOOM_EVENT_NONE;
 191
 192     c->m_queue_front = 0;
 193     c->m_queue_back = 0;
 194     return c;
 195 }
 196
 197 /* set database names. Take local databases (if set); otherwise
 198    take databases given in ZURL (if set); otherwise use Default */
 199 static char **set_DatabaseNames (ZOOM_connection con, ZOOM_options options,
 200                                  int *num)
 201 {
 202     char **databaseNames;
 203     const char *c;
 204     int no = 2;
 205     const char *cp = ZOOM_options_get (options, "databaseName");
 206
 207     if (!cp || !*cp)
 208     {
 209         if (strncmp (con->host_port, "unix:", 5) == 0)
 210             cp = strchr (con->host_port+5, ':');
 211         else
 212             cp = strchr (con->host_port, '/');
 213         if (cp)
 214             cp++;
 215     }
 216     if (cp)
 217     {
 218         c = cp;
 219         while ((c = strchr(c, '+')))
 220         {
 221             c++;
 222             no++;
 223         }
 224     }
 225     else
 226         cp = "Default";
 227     databaseNames = (char**)
 228         odr_malloc (con->odr_out, no * sizeof(*databaseNames));
 229     no = 0;
 230     while (*cp)
 231     {
 232         c = strchr (cp, '+');
 233         if (!c)
 234             c = cp + strlen(cp);
 235         else if (c == cp)
 236         {
 237             cp++;
 238             continue;
 239         }
 240         /* cp ptr to first char of db name, c is char
 241            following db name */
 242         databaseNames[no] = (char*) odr_malloc (con->odr_out, 1+c-cp);
 243         memcpy (databaseNames[no], cp, c-cp);
 244         databaseNames[no++][c-cp] = '\0';
 245         cp = c;
 246         if (*cp)
 247             cp++;
 248     }
 249     databaseNames[no] = NULL;
 250     *num = no;
 251     return databaseNames;
 252 }
 253
 254 ZOOM_API(ZOOM_connection)
 255 ZOOM_connection_new (const char *host, int portnum)
 256 {
 257     ZOOM_connection c = ZOOM_connection_create (0);
 258
 259     ZOOM_connection_connect (c, host, portnum);
 260     return c;
 261 }
 262
 263 ZOOM_API(void)
 264 ZOOM_connection_connect(ZOOM_connection c,
 265                         const char *host, int portnum)
 266 {
 267     const char *val;
 268     ZOOM_task task;
 269
 270     if (c->cs)
 271     {
 272         yaz_log (LOG_DEBUG, "reconnect");
 273         c->reconnect_ok = 1;
 274         return;
 275     }
 276     yaz_log(LOG_DEBUG, "connect");
 277     xfree (c->proxy);
 278     val = ZOOM_options_get (c->options, "proxy");
 279     if (val && *val)
 280         c->proxy = xstrdup (val);
 281     else
 282         c->proxy = 0;
 283
 284     xfree (c->charset);
 285     val = ZOOM_options_get (c->options, "charset");
 286     if (val && *val)
 287         c->charset = xstrdup (val);
 288     else
 289         c->charset = 0;
 290
 291     xfree (c->lang);
 292     val = ZOOM_options_get (c->options, "lang");
 293     if (val && *val)
 294         c->lang = xstrdup (val);
 295     else
 296         c->lang = 0;
 297
 298     xfree (c->host_port);
 299     if (portnum)
 300     {
 301         char hostn[128];
 302         sprintf (hostn, "%.80s:%d", host, portnum);
 303         c->host_port = xstrdup(hostn);
 304     }
 305     else
 306         c->host_port = xstrdup(host);
 307
 308     ZOOM_options_set(c->options, "host", c->host_port);
 309
 310     val = ZOOM_options_get (c->options, "cookie");
 311     if (val && *val)
 312         c->cookie_out = xstrdup (val);
 313
 314     val = ZOOM_options_get (c->options, "clientIP");
 315     if (val && *val)
 316         c->client_IP = xstrdup (val);
 317
 318     c->async = ZOOM_options_get_bool (c->options, "async", 0);
 319
 320     c->error = ZOOM_ERROR_NONE;
 321
 322     task = ZOOM_connection_add_task (c, ZOOM_TASK_CONNECT);
 323
 324     if (!c->async)
 325     {
 326         while (ZOOM_event (1, &c))
 327             ;
 328     }
 329 }
 330
 331 ZOOM_API(ZOOM_query)
 332 ZOOM_query_create(void)
 333 {
 334     ZOOM_query s = (ZOOM_query) xmalloc (sizeof(*s));
 335
 336     s->refcount = 1;
 337     s->query = 0;
 338     s->sort_spec = 0;
 339     s->odr = odr_createmem (ODR_ENCODE);
 340
 341     return s;
 342 }
 343
 344 ZOOM_API(void)
 345 ZOOM_query_destroy(ZOOM_query s)
 346 {
 347     if (!s)
 348         return;
 349
 350     (s->refcount)--;
 351     yaz_log (LOG_DEBUG, "ZOOM_query_destroy count=%d", s->refcount);
 352     if (s->refcount == 0)
 353     {
 354         odr_destroy (s->odr);
 355         xfree (s);
 356     }
 357 }
 358
 359 ZOOM_API(int)
 360 ZOOM_query_prefix(ZOOM_query s, const char *str)
 361 {
 362     s->query = (Z_Query *) odr_malloc (s->odr, sizeof(*s->query));
 363     s->query->which = Z_Query_type_1;
 364     s->query->u.type_1 =  p_query_rpn(s->odr, PROTO_Z3950, str);
 365     if (!s->query->u.type_1)
 366         return -1;
 367     return 0;
 368 }
 369
 370 ZOOM_API(int)
 371 ZOOM_query_sortby(ZOOM_query s, const char *criteria)
 372 {
 373     s->sort_spec = yaz_sort_spec (s->odr, criteria);
 374     if (!s->sort_spec)
 375         return -1;
 376     return 0;
 377 }
 378
 379 static int do_write(ZOOM_connection c);
 380
 381 ZOOM_API(void)
 382 ZOOM_connection_destroy(ZOOM_connection c)
 383 {
 384     ZOOM_resultset r;
 385     if (!c)
 386         return;
 387     if (c->cs)
 388         cs_close (c->cs);
 389     for (r = c->resultsets; r; r = r->next)
 390         r->connection = 0;
 391
 392     xfree (c->buf_in);
 393     xfree (c->addinfo);
 394     odr_destroy (c->odr_in);
 395     odr_destroy (c->odr_out);
 396     ZOOM_options_destroy (c->options);
 397     ZOOM_connection_remove_tasks (c);
 398     xfree (c->host_port);
 399     xfree (c->proxy);
 400     xfree (c->charset);
 401     xfree (c->lang);
 402     xfree (c->cookie_out);
 403     xfree (c->cookie_in);
 404     xfree (c->client_IP);
 405     xfree (c);
 406 }
 407
 408 void ZOOM_resultset_addref (ZOOM_resultset r)
 409 {
 410     if (r)
 411         (r->refcount)++;
 412 }
 413 ZOOM_resultset ZOOM_resultset_create ()
 414 {
 415     ZOOM_resultset r = (ZOOM_resultset) xmalloc (sizeof(*r));
 416
 417     r->refcount = 1;
 418     r->size = 0;
 419     r->odr = odr_createmem (ODR_ENCODE);
 420     r->start = 0;
 421     r->piggyback = 1;
 422     r->setname = 0;
 423     r->count = 0;
 424     r->record_cache = 0;
 425     r->r_sort_spec = 0;
 426     r->r_query = 0;
 427     r->search = 0;
 428     r->connection = 0;
 429     r->next = 0;
 430     return r;
 431 }
 432
 433 ZOOM_API(ZOOM_resultset)
 434 ZOOM_connection_search_pqf(ZOOM_connection c, const char *q)
 435 {
 436     ZOOM_resultset r;
 437     ZOOM_query s = ZOOM_query_create();
 438
 439     ZOOM_query_prefix (s, q);
 440
 441     r = ZOOM_connection_search (c, s);
 442     ZOOM_query_destroy (s);
 443     return r;
 444 }
 445
 446 ZOOM_API(ZOOM_resultset)
 447 ZOOM_connection_search(ZOOM_connection c, ZOOM_query q)
 448 {
 449     ZOOM_resultset r = ZOOM_resultset_create ();
 450     ZOOM_task task;
 451     const char *cp;
 452
 453     r->r_sort_spec = q->sort_spec;
 454     r->r_query = q->query;
 455     r->search = q;
 456
 457     r->options = ZOOM_options_create_with_parent(c->options);
 458
 459     r->start = ZOOM_options_get_int(r->options, "start", 0);
 460     r->count = ZOOM_options_get_int(r->options, "count", 0);
 461     r->piggyback = ZOOM_options_get_bool (r->options, "piggyback", 1);
 462     cp = ZOOM_options_get (r->options, "setname");
 463     if (cp)
 464         r->setname = xstrdup (cp);
 465
 466     r->connection = c;
 467
 468     r->next = c->resultsets;
 469     c->resultsets = r;
 470
 471     task = ZOOM_connection_add_task (c, ZOOM_TASK_SEARCH);
 472     task->u.search.resultset = r;
 473     ZOOM_resultset_addref (r);
 474
 475     (q->refcount)++;
 476
 477     if (!c->async)
 478     {
 479         while (ZOOM_event (1, &c))
 480             ;
 481     }
 482     return r;
 483 }
 484
 485 ZOOM_API(void)
 486 ZOOM_resultset_destroy(ZOOM_resultset r)
 487 {
 488     if (!r)
 489         return;
 490     (r->refcount)--;
 491     yaz_log (LOG_DEBUG, "destroy r = %p count=%d", r, r->refcount);
 492     if (r->refcount == 0)
 493     {
 494         ZOOM_record_cache rc;
 495
 496         for (rc = r->record_cache; rc; rc = rc->next)
 497             if (rc->rec.wrbuf_marc)
 498                 wrbuf_free (rc->rec.wrbuf_marc, 1);
 499         if (r->connection)
 500         {
 501             /* remove ourselves from the resultsets in connection */
 502             ZOOM_resultset *rp = &r->connection->resultsets;
 503             while (1)
 504             {
 505                 assert (*rp);   /* we must be in this list!! */
 506                 if (*rp == r)
 507                 {   /* OK, we're here - take us out of it */
 508                     *rp = (*rp)->next;
 509                     break;
 510                 }
 511                 rp = &(*rp)->next;
 512             }
 513         }
 514         ZOOM_query_destroy (r->search);
 515         ZOOM_options_destroy (r->options);
 516         odr_destroy (r->odr);
 517         xfree (r->setname);
 518         xfree (r);
 519     }
 520 }
 521
 522 ZOOM_API(size_t)
 523 ZOOM_resultset_size (ZOOM_resultset r)
 524 {
 525     return r->size;
 526 }
 527
 528 static void do_close (ZOOM_connection c)
 529 {
 530     if (c->cs)
 531         cs_close(c->cs);
 532     c->cs = 0;
 533     c->mask = 0;
 534     c->state = STATE_IDLE;
 535 }
 536
 537 static void ZOOM_resultset_retrieve (ZOOM_resultset r,
 538                                      int force_sync, int start, int count)
 539 {
 540     ZOOM_task task;
 541     ZOOM_connection c;
 542
 543     if (!r)
 544         return;
 545     c = r->connection;
 546     if (!c)
 547         return;
 548     task = ZOOM_connection_add_task (c, ZOOM_TASK_RETRIEVE);
 549     task->u.retrieve.resultset = r;
 550     task->u.retrieve.start = start;
 551     task->u.retrieve.count = count;
 552
 553     ZOOM_resultset_addref (r);
 554
 555     if (!r->connection->async || force_sync)
 556         while (r->connection && ZOOM_event (1, &r->connection))
 557             ;
 558 }
 559
 560 ZOOM_API(void)
 561 ZOOM_resultset_records (ZOOM_resultset r, ZOOM_record *recs,
 562                         size_t start, size_t count)
 563 {
 564     int force_present = 0;
 565
 566     if (!r)
 567         return ;
 568     if (count && recs)
 569         force_present = 1;
 570     ZOOM_resultset_retrieve (r, force_present, start, count);
 571     if (force_present)
 572     {
 573         size_t i;
 574         for (i = 0; i< count; i++)
 575             recs[i] = ZOOM_resultset_record_immediate (r, i+start);
 576     }
 577 }
 578
 579 static int do_connect (ZOOM_connection c)
 580 {
 581     void *add;
 582     const char *effective_host;
 583
 584     if (c->proxy)
 585         effective_host = c->proxy;
 586     else
 587         effective_host = c->host_port;
 588
 589     yaz_log (LOG_DEBUG, "do_connect host=%s", effective_host);
 590
 591     assert (!c->cs);
 592     c->cs = cs_create_host (effective_host, 0, &add);
 593
 594     if (c->cs)
 595     {
 596         int ret = cs_connect (c->cs, add);
 597         if (ret == 0)
 598         {
 599             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_CONNECT);
 600             ZOOM_connection_put_event(c, event);
 601             ZOOM_connection_send_init(c);
 602             c->state = STATE_ESTABLISHED;
 603             return 1;
 604         }
 605         else if (ret > 0)
 606         {
 607             c->state = STATE_CONNECTING;
 608             c->mask = ZOOM_SELECT_EXCEPT;
 609             if (c->cs->io_pending & CS_WANT_WRITE)
 610                 c->mask += ZOOM_SELECT_WRITE;
 611             if (c->cs->io_pending & CS_WANT_READ)
 612                 c->mask += ZOOM_SELECT_READ;
 613             return 1;
 614         }
 615     }
 616     c->state = STATE_IDLE;
 617     c->error = ZOOM_ERROR_CONNECT;
 618     return 0;
 619 }
 620
 621 int z3950_connection_socket(ZOOM_connection c)
 622 {
 623     if (c->cs)
 624         return cs_fileno(c->cs);
 625     return -1;
 626 }
 627
 628 int z3950_connection_mask(ZOOM_connection c)
 629 {
 630     if (c->cs)
 631         return c->mask;
 632     return 0;
 633 }
 634
 635 static void otherInfo_attach (ZOOM_connection c, Z_APDU *a, ODR out)
 636 {
 637     int i;
 638     for (i = 0; i<200; i++)
 639     {
 640         size_t len;
 641         Z_OtherInformation **oi;
 642         char buf[80];
 643         const char *val;
 644         const char *cp;
 645         int oidval;
 646
 647         sprintf (buf, "otherInfo%d", i);
 648         val = ZOOM_options_get (c->options, buf);
 649         if (!val)
 650             break;
 651         cp = strchr (val, ':');
 652         if (!cp)
 653             continue;
 654         len = cp - val;
 655         if (len >= sizeof(buf))
 656             len = sizeof(buf)-1;
 657         memcpy (buf, val, len);
 658         buf[len] = '\0';
 659         oidval = oid_getvalbyname (buf);
 660         if (oidval == VAL_NONE)
 661             continue;
 662
 663         yaz_oi_APDU(a, &oi);
 664         yaz_oi_set_string_oidval(oi, out, oidval, 1, cp+1);
 665     }
 666 }
 667
 668 static int encode_APDU(ZOOM_connection c, Z_APDU *a, ODR out)
 669 {
 670     assert (a);
 671     if (c->cookie_out)
 672     {
 673         Z_OtherInformation **oi;
 674         yaz_oi_APDU(a, &oi);
 675         yaz_oi_set_string_oidval(oi, out, VAL_COOKIE, 1, c->cookie_out);
 676     }
 677     if (c->client_IP)
 678     {
 679         Z_OtherInformation **oi;
 680         yaz_oi_APDU(a, &oi);
 681         yaz_oi_set_string_oidval(oi, out, VAL_CLIENT_IP, 1, c->client_IP);
 682     }
 683     otherInfo_attach (c, a, out);
 684     if (!z_APDU(out, &a, 0, 0))
 685     {
 686         FILE *outf = fopen("/tmp/apdu.txt", "a");
 687         if (a && outf)
 688         {
 689             ODR odr_pr = odr_createmem(ODR_PRINT);
 690             fprintf (outf, "a=%p\n", a);
 691             odr_setprint(odr_pr, outf);
 692             z_APDU(odr_pr, &a, 0, 0);
 693             odr_destroy(odr_pr);
 694         }
 695         c->error = ZOOM_ERROR_ENCODE;
 696         do_close (c);
 697         return -1;
 698     }
 699
 700     return 0;
 701 }
 702
 703 static int send_APDU (ZOOM_connection c, Z_APDU *a)
 704 {
 705     ZOOM_Event event;
 706     assert (a);
 707     if (encode_APDU(c, a, c->odr_out))
 708         return -1;
 709     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
 710     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
 711     ZOOM_connection_put_event (c, event);
 712     odr_reset(c->odr_out);
 713     do_write (c);
 714     return 0;
 715 }
 716
 717 static int ZOOM_connection_send_init (ZOOM_connection c)
 718 {
 719     const char *impname;
 720     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_initRequest);
 721     Z_InitRequest *ireq = apdu->u.initRequest;
 722     Z_IdAuthentication *auth = (Z_IdAuthentication *)
 723         odr_malloc(c->odr_out, sizeof(*auth));
 724     const char *auth_groupId = ZOOM_options_get (c->options, "group");
 725     const char *auth_userId = ZOOM_options_get (c->options, "user");
 726     const char *auth_password = ZOOM_options_get (c->options, "pass");
 727
 728     ODR_MASK_SET(ireq->options, Z_Options_search);
 729     ODR_MASK_SET(ireq->options, Z_Options_present);
 730     ODR_MASK_SET(ireq->options, Z_Options_scan);
 731     ODR_MASK_SET(ireq->options, Z_Options_sort);
 732     ODR_MASK_SET(ireq->options, Z_Options_extendedServices);
 733     ODR_MASK_SET(ireq->options, Z_Options_namedResultSets);
 734
 735     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_1);
 736     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_2);
 737     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_3);
 738
 739     impname = ZOOM_options_get (c->options, "implementationName");
 740     ireq->implementationName =
 741         (char *) odr_malloc (c->odr_out, 15 + (impname ? strlen(impname) : 0));
 742     strcpy (ireq->implementationName, "");
 743     if (impname)
 744     {
 745         strcat (ireq->implementationName, impname);
 746         strcat (ireq->implementationName, "/");
 747     }
 748     strcat (ireq->implementationName, "ZOOM-C/YAZ");
 749
 750     *ireq->maximumRecordSize =
 751         ZOOM_options_get_int (c->options, "maximumRecordSize", 1024*1024);
 752     *ireq->preferredMessageSize =
 753         ZOOM_options_get_int (c->options, "preferredMessageSize", 1024*1024);
 754
 755     if (auth_groupId || auth_password)
 756     {
 757         Z_IdPass *pass = (Z_IdPass *) odr_malloc(c->odr_out, sizeof(*pass));
 758         int i = 0;
 759         pass->groupId = 0;
 760         if (auth_groupId && *auth_groupId)
 761         {
 762             pass->groupId = (char *)
 763                 odr_malloc(c->odr_out, strlen(auth_groupId)+1);
 764             strcpy(pass->groupId, auth_groupId);
 765             i++;
 766         }
 767         pass->userId = 0;
 768         if (auth_userId && *auth_userId)
 769         {
 770             pass->userId = (char *)
 771                 odr_malloc(c->odr_out, strlen(auth_userId)+1);
 772             strcpy(pass->userId, auth_userId);
 773             i++;
 774         }
 775         pass->password = 0;
 776         if (auth_password && *auth_password)
 777         {
 778             pass->password = (char *)
 779                 odr_malloc(c->odr_out, strlen(auth_password)+1);
 780             strcpy(pass->password, auth_password);
 781             i++;
 782         }
 783         if (i)
 784         {
 785             auth->which = Z_IdAuthentication_idPass;
 786             auth->u.idPass = pass;
 787             ireq->idAuthentication = auth;
 788         }
 789     }
 790     else if (auth_userId)
 791     {
 792         auth->which = Z_IdAuthentication_open;
 793         auth->u.open = (char *)
 794             odr_malloc(c->odr_out, strlen(auth_userId)+1);
 795         strcpy(auth->u.open, auth_userId);
 796         ireq->idAuthentication = auth;
 797     }
 798     if (c->proxy)
 799         yaz_oi_set_string_oidval(&ireq->otherInfo, c->odr_out,
 800                                  VAL_PROXY, 1, c->host_port);
 801     if (c->charset||c->lang)
 802     {
 803         Z_OtherInformation **oi;
 804         Z_OtherInformationUnit *oi_unit;
 805
 806         yaz_oi_APDU(apdu, &oi);
 807
 808         if ((oi_unit = yaz_oi_update(oi, c->odr_out, NULL, 0, 0)))
 809         {
 810             ODR_MASK_SET(ireq->options, Z_Options_negotiationModel);
 811
 812             oi_unit->which = Z_OtherInfo_externallyDefinedInfo;
 813             oi_unit->information.externallyDefinedInfo =
 814                 yaz_set_proposal_charneg
 815                 (c->odr_out,
 816                  (const char **)&c->charset, (c->charset) ? 1:0,
 817                  (const char **)&c->lang, (c->lang) ? 1:0, 1);
 818         }
 819     }
 820     assert (apdu);
 821     send_APDU (c, apdu);
 822
 823     return 0;
 824 }
 825
 826 static int ZOOM_connection_send_search (ZOOM_connection c)
 827 {
 828     ZOOM_resultset r;
 829     int lslb, ssub, mspn;
 830     const char *syntax;
 831     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_searchRequest);
 832     Z_SearchRequest *search_req = apdu->u.searchRequest;
 833     const char *elementSetName;
 834     const char *smallSetElementSetName;
 835     const char *mediumSetElementSetName;
 836     const char *schema;
 837
 838     assert (c->tasks);
 839     assert (c->tasks->which == ZOOM_TASK_SEARCH);
 840
 841     r = c->tasks->u.search.resultset;
 842
 843     elementSetName =
 844         ZOOM_options_get (r->options, "elementSetName");
 845     smallSetElementSetName  =
 846         ZOOM_options_get (r->options, "smallSetElementSetName");
 847     mediumSetElementSetName =
 848         ZOOM_options_get (r->options, "mediumSetElementSetName");
 849     schema =
 850         ZOOM_options_get (r->options, "schema");
 851
 852     if (!smallSetElementSetName)
 853         smallSetElementSetName = elementSetName;
 854
 855     if (!mediumSetElementSetName)
 856         mediumSetElementSetName = elementSetName;
 857
 858     assert (r);
 859     assert (r->r_query);
 860
 861     /* prepare query for the search request */
 862     search_req->query = r->r_query;
 863
 864     search_req->databaseNames =
 865         set_DatabaseNames (c, r->options, &search_req->num_databaseNames);
 866
 867     /* get syntax (no need to provide unless piggyback is in effect) */
 868     syntax = ZOOM_options_get (r->options, "preferredRecordSyntax");
 869
 870     lslb = ZOOM_options_get_int (r->options, "largeSetLowerBound", -1);
 871     ssub = ZOOM_options_get_int (r->options, "smallSetUpperBound", -1);
 872     mspn = ZOOM_options_get_int (r->options, "mediumSetPresentNumber", -1);
 873     if (lslb != -1 && ssub != -1 && mspn != -1)
 874     {
 875         /* So're a Z39.50 expert? Let's hope you don't do sort */
 876         *search_req->largeSetLowerBound = lslb;
 877         *search_req->smallSetUpperBound = ssub;
 878         *search_req->mediumSetPresentNumber = mspn;
 879     }
 880     else if (r->start == 0 && r->count > 0
 881              && r->piggyback && !r->r_sort_spec && !schema)
 882     {
 883         /* Regular piggyback - do it unless we're going to do sort */
 884         *search_req->largeSetLowerBound = 2000000000;
 885         *search_req->smallSetUpperBound = r->count;
 886         *search_req->mediumSetPresentNumber = r->count;
 887         smallSetElementSetName = 0;  /* no need to provide this */
 888     }
 889     else
 890     {
 891         /* non-piggyback. Need not provide elementsets or syntaxes .. */
 892         smallSetElementSetName = 0;
 893         mediumSetElementSetName = 0;
 894         syntax = 0;
 895     }
 896     if (smallSetElementSetName && *smallSetElementSetName)
 897     {
 898         Z_ElementSetNames *esn = (Z_ElementSetNames *)
 899             odr_malloc (c->odr_out, sizeof(*esn));
 900
 901         esn->which = Z_ElementSetNames_generic;
 902         esn->u.generic = odr_strdup (c->odr_out, smallSetElementSetName);
 903         search_req->smallSetElementSetNames = esn;
 904     }
 905     if (mediumSetElementSetName && *mediumSetElementSetName)
 906     {
 907         Z_ElementSetNames *esn = (Z_ElementSetNames *)
 908             odr_malloc (c->odr_out, sizeof(*esn));
 909
 910         esn->which = Z_ElementSetNames_generic;
 911         esn->u.generic = odr_strdup (c->odr_out, mediumSetElementSetName);
 912         search_req->mediumSetElementSetNames = esn;
 913     }
 914     if (syntax)
 915         search_req->preferredRecordSyntax =
 916             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
 917
 918     if (!r->setname)
 919     {
 920         if (c->support_named_resultsets)
 921         {
 922             char setname[14];
 923             int ord;
 924             /* find the lowest unused ordinal so that we re-use
 925                result sets on the server. */
 926             for (ord = 1; ; ord++)
 927             {
 928                 ZOOM_resultset rp;
 929                 sprintf (setname, "%d", ord);
 930                 for (rp = c->resultsets; rp; rp = rp->next)
 931                     if (rp->setname && !strcmp (rp->setname, setname))
 932                         break;
 933                 if (!rp)
 934                     break;
 935             }
 936             r->setname = xstrdup (setname);
 937             yaz_log (LOG_DEBUG, "allocating %s", r->setname);
 938         }
 939         else
 940             r->setname = xstrdup ("default");
 941         ZOOM_options_set (r->options, "setname", r->setname);
 942     }
 943     search_req->resultSetName = odr_strdup(c->odr_out, r->setname);
 944     /* send search request */
 945     send_APDU (c, apdu);
 946     return 1;
 947 }
 948
 949 static void response_diag (ZOOM_connection c, Z_DiagRec *p)
 950 {
 951     Z_DefaultDiagFormat *r;
 952     char *addinfo = 0;
 953
 954     xfree (c->addinfo);
 955     c->addinfo = 0;
 956     if (p->which != Z_DiagRec_defaultFormat)
 957     {
 958         c->error = ZOOM_ERROR_DECODE;
 959         return;
 960     }
 961     r = p->u.defaultFormat;
 962     switch (r->which)
 963     {
 964     case Z_DefaultDiagFormat_v2Addinfo:
 965         addinfo = r->u.v2Addinfo;
 966         break;
 967     case Z_DefaultDiagFormat_v3Addinfo:
 968         addinfo = r->u.v3Addinfo;
 969         break;
 970     }
 971     if (addinfo)
 972         c->addinfo = xstrdup (addinfo);
 973     c->error = *r->condition;
 974 }
 975
 976 ZOOM_API(ZOOM_record)
 977 ZOOM_record_clone (ZOOM_record srec)
 978 {
 979     char *buf;
 980     int size;
 981     ODR odr_enc;
 982     ZOOM_record nrec;
 983
 984     odr_enc = odr_createmem(ODR_ENCODE);
 985     if (!z_NamePlusRecord (odr_enc, &srec->npr, 0, 0))
 986         return 0;
 987     buf = odr_getbuf (odr_enc, &size, 0);
 988
 989     nrec = (ZOOM_record) xmalloc (sizeof(*nrec));
 990     nrec->odr = odr_createmem(ODR_DECODE);
 991     nrec->wrbuf_marc = 0;
 992     odr_setbuf (nrec->odr, buf, size, 0);
 993     z_NamePlusRecord (nrec->odr, &nrec->npr, 0, 0);
 994
 995     odr_destroy (odr_enc);
 996     return nrec;
 997 }
 998
 999 ZOOM_API(ZOOM_record)
1000 ZOOM_resultset_record_immediate (ZOOM_resultset s,size_t pos)
1001 {
1002     return record_cache_lookup (s, pos);
1003 }
1004
1005 ZOOM_API(ZOOM_record)
1006 ZOOM_resultset_record (ZOOM_resultset r, size_t pos)
1007 {
1008     ZOOM_resultset_retrieve (r, 1, pos, 1);
1009     return ZOOM_resultset_record_immediate (r, pos);
1010 }
1011
1012 ZOOM_API(void)
1013 ZOOM_record_destroy (ZOOM_record rec)
1014 {
1015     if (!rec)
1016         return;
1017     if (rec->wrbuf_marc)
1018         wrbuf_free (rec->wrbuf_marc, 1);
1019     odr_destroy (rec->odr);
1020     xfree (rec);
1021 }
1022
1023 ZOOM_API(const char *)
1024 ZOOM_record_get (ZOOM_record rec, const char *type, int *len)
1025 {
1026     Z_NamePlusRecord *npr;
1027
1028     if (len)
1029         *len = 0; /* default return */
1030
1031     if (!rec)
1032         return 0;
1033     npr = rec->npr;
1034     if (!npr)
1035         return 0;
1036     if (!strcmp (type, "database"))
1037     {
1038         if (len)
1039             *len = (npr->databaseName ? strlen(npr->databaseName) : 0);
1040         return npr->databaseName;
1041     }
1042     else if (!strcmp (type, "syntax"))
1043     {
1044         if (npr->which == Z_NamePlusRecord_databaseRecord)
1045         {
1046             Z_External *r = (Z_External *) npr->u.databaseRecord;
1047             oident *ent = oid_getentbyoid(r->direct_reference);
1048             if (ent)
1049             {
1050                 if (len)
1051                     *len = strlen(ent->desc);
1052                 return ent->desc;
1053             }
1054         }
1055         return "none";
1056     }
1057     else if (!strcmp (type, "render") &&
1058              npr->which == Z_NamePlusRecord_databaseRecord)
1059     {
1060         Z_External *r = (Z_External *) npr->u.databaseRecord;
1061         oident *ent = oid_getentbyoid(r->direct_reference);
1062
1063         if (r->which == Z_External_sutrs)
1064         {
1065             if (len) *len = r->u.sutrs->len;
1066             return (const char *) r->u.sutrs->buf;
1067         }
1068         else if (r->which == Z_External_octet)
1069         {
1070             switch (ent->value)
1071             {
1072             case VAL_SOIF:
1073             case VAL_HTML:
1074             case VAL_SUTRS:
1075                 break;
1076             case VAL_TEXT_XML:
1077             case VAL_APPLICATION_XML:
1078                 break;
1079             default:
1080                 if (!rec->wrbuf_marc)
1081                     rec->wrbuf_marc = wrbuf_alloc();
1082                 wrbuf_rewind (rec->wrbuf_marc);
1083                 if (yaz_marc_decode ((const char *)
1084                                      r->u.octet_aligned->buf,
1085                                      rec->wrbuf_marc, 0,
1086                                      r->u.octet_aligned->len,
1087                                      0) > 0)
1088                 {
1089                     if (len) *len = wrbuf_len(rec->wrbuf_marc);
1090                     return wrbuf_buf(rec->wrbuf_marc);
1091                 }
1092             }
1093             if (len) *len = r->u.octet_aligned->len;
1094             return (const char *) r->u.octet_aligned->buf;
1095         }
1096         else if (r->which == Z_External_grs1)
1097         {
1098             if (len) *len = 5;
1099             return "GRS-1";
1100         }
1101         return 0;
1102     }
1103     else if (!strcmp (type, "xml") &&
1104              npr->which == Z_NamePlusRecord_databaseRecord)
1105     {
1106         Z_External *r = (Z_External *) npr->u.databaseRecord;
1107         oident *ent = oid_getentbyoid(r->direct_reference);
1108
1109         if (r->which == Z_External_sutrs)
1110         {
1111             if (len) *len = r->u.sutrs->len;
1112             return (const char *) r->u.sutrs->buf;
1113         }
1114         else if (r->which == Z_External_octet)
1115         {
1116             switch (ent->value)
1117             {
1118             case VAL_SOIF:
1119             case VAL_HTML:
1120             case VAL_SUTRS:
1121                 break;
1122             case VAL_TEXT_XML:
1123             case VAL_APPLICATION_XML:
1124                 break;
1125             default:
1126                 if (!rec->wrbuf_marc)
1127                     rec->wrbuf_marc = wrbuf_alloc();
1128                 wrbuf_rewind (rec->wrbuf_marc);
1129                 if (yaz_marc_decode ((const char *)
1130                                      r->u.octet_aligned->buf,
1131                                      rec->wrbuf_marc, 0,
1132                                      r->u.octet_aligned->len,
1133                                      1) > 0)
1134                 {
1135                     if (len) *len = wrbuf_len(rec->wrbuf_marc);
1136                     return wrbuf_buf(rec->wrbuf_marc);
1137                 }
1138             }
1139             if (len) *len = r->u.octet_aligned->len;
1140             return (const char *) r->u.octet_aligned->buf;
1141         }
1142         else if (r->which == Z_External_grs1)
1143         {
1144             if (len) *len = 5;
1145             return "GRS-1";
1146         }
1147         return 0;
1148     }
1149     else if (!strcmp (type, "raw"))
1150     {
1151         if (npr->which == Z_NamePlusRecord_databaseRecord)
1152         {
1153             Z_External *r = (Z_External *) npr->u.databaseRecord;
1154
1155             if (r->which == Z_External_sutrs)
1156             {
1157                 if (len) *len = r->u.sutrs->len;
1158                 return (const char *) r->u.sutrs->buf;
1159             }
1160             else if (r->which == Z_External_octet)
1161             {
1162                 if (len) *len = r->u.octet_aligned->len;
1163                 return (const char *) r->u.octet_aligned->buf;
1164             }
1165             else /* grs-1, explain, ... */
1166             {
1167                 if (len) *len = -1;
1168                 return (const char *) npr->u.databaseRecord;
1169             }
1170         }
1171         return 0;
1172     }
1173     else if (!strcmp (type, "ext"))
1174     {
1175         if (npr->which == Z_NamePlusRecord_databaseRecord)
1176             return (const char *) npr->u.databaseRecord;
1177         return 0;
1178     }
1179     return 0;
1180 }
1181
1182 static void record_cache_add (ZOOM_resultset r, Z_NamePlusRecord *npr, int pos)
1183 {
1184     ZOOM_record_cache rc;
1185     const char *elementSetName =
1186         ZOOM_resultset_option_get (r, "elementSetName");
1187     const char *syntax =
1188         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1189
1190
1191     for (rc = r->record_cache; rc; rc = rc->next)
1192     {
1193         if (pos == rc->pos)
1194         {
1195             if ((!elementSetName && !rc->elementSetName)
1196                 || (elementSetName && rc->elementSetName &&
1197                     !strcmp (elementSetName, rc->elementSetName)))
1198             {
1199                 if ((!syntax && !rc->syntax)
1200                     || (syntax && rc->syntax &&
1201                         !strcmp (syntax, rc->syntax)))
1202                 {
1203                     /* not destroying rc->npr (it's handled by nmem )*/
1204                     rc->rec.npr = npr;
1205                     /* keeping wrbuf_marc too */
1206                     return;
1207                 }
1208             }
1209         }
1210     }
1211     rc = (ZOOM_record_cache) odr_malloc (r->odr, sizeof(*rc));
1212     rc->rec.npr = npr;
1213     rc->rec.odr = 0;
1214     rc->rec.wrbuf_marc = 0;
1215     if (elementSetName)
1216         rc->elementSetName = odr_strdup (r->odr, elementSetName);
1217     else
1218         rc->elementSetName = 0;
1219
1220     if (syntax)
1221         rc->syntax = odr_strdup (r->odr, syntax);
1222     else
1223         rc->syntax = 0;
1224
1225     rc->pos = pos;
1226     rc->next = r->record_cache;
1227     r->record_cache = rc;
1228 }
1229
1230 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos)
1231 {
1232     ZOOM_record_cache rc;
1233     const char *elementSetName =
1234         ZOOM_resultset_option_get (r, "elementSetName");
1235     const char *syntax =
1236         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1237
1238     for (rc = r->record_cache; rc; rc = rc->next)
1239     {
1240         if (pos == rc->pos)
1241         {
1242             if ((!elementSetName && !rc->elementSetName)
1243                 || (elementSetName && rc->elementSetName &&
1244                     !strcmp (elementSetName, rc->elementSetName)))
1245             {
1246                 if ((!syntax && !rc->syntax)
1247                     || (syntax && rc->syntax &&
1248                         !strcmp (syntax, rc->syntax)))
1249                     return &rc->rec;
1250             }
1251         }
1252     }
1253     return 0;
1254 }
1255
1256 static void handle_records (ZOOM_connection c, Z_Records *sr,
1257                             int present_phase)
1258 {
1259     ZOOM_resultset resultset;
1260
1261     if (!c->tasks)
1262         return ;
1263     switch (c->tasks->which)
1264     {
1265     case ZOOM_TASK_SEARCH:
1266         resultset = c->tasks->u.search.resultset;
1267         break;
1268     case ZOOM_TASK_RETRIEVE:
1269         resultset = c->tasks->u.retrieve.resultset;
1270         break;
1271     default:
1272         return;
1273     }
1274     if (sr && sr->which == Z_Records_NSD)
1275     {
1276         Z_DiagRec dr, *dr_p = &dr;
1277         dr.which = Z_DiagRec_defaultFormat;
1278         dr.u.defaultFormat = sr->u.nonSurrogateDiagnostic;
1279
1280         response_diag (c, dr_p);
1281     }
1282     else if (sr && sr->which == Z_Records_multipleNSD)
1283     {
1284         if (sr->u.multipleNonSurDiagnostics->num_diagRecs >= 1)
1285             response_diag(c, sr->u.multipleNonSurDiagnostics->diagRecs[0]);
1286         else
1287             c->error = ZOOM_ERROR_DECODE;
1288     }
1289     else
1290     {
1291         if (resultset->count + resultset->start > resultset->size)
1292             resultset->count = resultset->size - resultset->start;
1293         if (resultset->count < 0)
1294             resultset->count = 0;
1295         if (sr && sr->which == Z_Records_DBOSD)
1296         {
1297             int i;
1298             NMEM nmem = odr_extract_mem (c->odr_in);
1299             Z_NamePlusRecordList *p =
1300                 sr->u.databaseOrSurDiagnostics;
1301             for (i = 0; i<p->num_records; i++)
1302             {
1303                 record_cache_add (resultset, p->records[i],
1304                                   i+ resultset->start);
1305             }
1306             /* transfer our response to search_nmem .. we need it later */
1307             nmem_transfer (resultset->odr->mem, nmem);
1308             nmem_destroy (nmem);
1309             if (present_phase && p->num_records == 0)
1310             {
1311                 /* present response and we didn't get any records! */
1312                 c->error = ZOOM_ERROR_DECODE;
1313             }
1314         }
1315         else if (present_phase)
1316         {
1317             /* present response and we didn't get any records! */
1318             c->error = ZOOM_ERROR_DECODE;
1319         }
1320     }
1321 }
1322
1323 static void handle_present_response (ZOOM_connection c, Z_PresentResponse *pr)
1324 {
1325     handle_records (c, pr->records, 1);
1326 }
1327
1328 static void handle_search_response (ZOOM_connection c, Z_SearchResponse *sr)
1329 {
1330     ZOOM_resultset resultset;
1331
1332     yaz_log (LOG_DEBUG, "got search response");
1333
1334     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1335         return ;
1336
1337     resultset = c->tasks->u.search.resultset;
1338
1339     resultset->size = *sr->resultCount;
1340     handle_records (c, sr->records, 0);
1341 }
1342
1343 static void sort_response (ZOOM_connection c, Z_SortResponse *res)
1344 {
1345     if (res->diagnostics && res->num_diagnostics > 0)
1346         response_diag (c, res->diagnostics[0]);
1347 }
1348
1349 static int scan_response (ZOOM_connection c, Z_ScanResponse *res)
1350 {
1351     NMEM nmem = odr_extract_mem (c->odr_in);
1352     ZOOM_scanset scan;
1353
1354     if (!c->tasks || c->tasks->which != ZOOM_TASK_SCAN)
1355         return 0;
1356     scan = c->tasks->u.scan.scan;
1357
1358     if (res->entries && res->entries->nonsurrogateDiagnostics)
1359         response_diag(c, res->entries->nonsurrogateDiagnostics[0]);
1360     scan->scan_response = res;
1361     nmem_transfer (scan->odr->mem, nmem);
1362     if (res->stepSize)
1363         ZOOM_options_set_int (scan->options, "stepSize", *res->stepSize);
1364     if (res->positionOfTerm)
1365         ZOOM_options_set_int (scan->options, "position", *res->positionOfTerm);
1366     if (res->scanStatus)
1367         ZOOM_options_set_int (scan->options, "scanStatus", *res->scanStatus);
1368     if (res->numberOfEntriesReturned)
1369         ZOOM_options_set_int (scan->options, "number",
1370                               *res->numberOfEntriesReturned);
1371     nmem_destroy (nmem);
1372     return 1;
1373 }
1374
1375 static int send_sort (ZOOM_connection c)
1376 {
1377     ZOOM_resultset  resultset;
1378
1379     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1380         return 0;
1381
1382     resultset = c->tasks->u.search.resultset;
1383
1384     if (c->error)
1385     {
1386         resultset->r_sort_spec = 0;
1387         return 0;
1388     }
1389     if (resultset->r_sort_spec)
1390     {
1391         Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_sortRequest);
1392         Z_SortRequest *req = apdu->u.sortRequest;
1393
1394         req->num_inputResultSetNames = 1;
1395         req->inputResultSetNames = (Z_InternationalString **)
1396             odr_malloc (c->odr_out, sizeof(*req->inputResultSetNames));
1397         req->inputResultSetNames[0] =
1398             odr_strdup (c->odr_out, resultset->setname);
1399         req->sortedResultSetName = odr_strdup (c->odr_out, resultset->setname);
1400         req->sortSequence = resultset->r_sort_spec;
1401         resultset->r_sort_spec = 0;
1402         send_APDU (c, apdu);
1403         return 1;
1404     }
1405     return 0;
1406 }
1407
1408 static int send_present (ZOOM_connection c)
1409 {
1410     Z_APDU *apdu = 0;
1411     Z_PresentRequest *req = 0;
1412     int i = 0;
1413     const char *syntax = 0;
1414     const char *elementSetName = 0;
1415     const char *schema = 0;
1416     ZOOM_resultset  resultset;
1417
1418     if (!c->tasks)
1419         return 0;
1420
1421     switch (c->tasks->which)
1422     {
1423     case ZOOM_TASK_SEARCH:
1424         resultset = c->tasks->u.search.resultset;
1425         break;
1426     case ZOOM_TASK_RETRIEVE:
1427         resultset = c->tasks->u.retrieve.resultset;
1428         resultset->start = c->tasks->u.retrieve.start;
1429         resultset->count = c->tasks->u.retrieve.count;
1430
1431         if (resultset->start >= resultset->size)
1432             return 0;
1433         if (resultset->start + resultset->count > resultset->size)
1434             resultset->count = resultset->size - resultset->start;
1435         break;
1436     default:
1437         return 0;
1438     }
1439
1440     syntax = ZOOM_resultset_option_get (resultset, "preferredRecordSyntax");
1441     elementSetName = ZOOM_resultset_option_get (resultset, "elementSetName");
1442     schema = ZOOM_resultset_option_get (resultset, "schema");
1443
1444     if (c->error)                  /* don't continue on error */
1445         return 0;
1446     if (resultset->start < 0)
1447         return 0;
1448     for (i = 0; i<resultset->count; i++)
1449     {
1450         ZOOM_record rec =
1451             record_cache_lookup (resultset, i + resultset->start);
1452         if (!rec)
1453             break;
1454     }
1455     if (i == resultset->count)
1456         return 0;
1457
1458     apdu = zget_APDU(c->odr_out, Z_APDU_presentRequest);
1459     req = apdu->u.presentRequest;
1460
1461     resultset->start += i;
1462     resultset->count -= i;
1463     *req->resultSetStartPoint = resultset->start + 1;
1464     *req->numberOfRecordsRequested = resultset->count;
1465     assert (*req->numberOfRecordsRequested > 0);
1466
1467     if (syntax && *syntax)
1468         req->preferredRecordSyntax =
1469             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1470
1471     if (schema && *schema)
1472     {
1473         Z_RecordComposition *compo = (Z_RecordComposition *)
1474             odr_malloc (c->odr_out, sizeof(*compo));
1475
1476         req->recordComposition = compo;
1477         compo->which = Z_RecordComp_complex;
1478         compo->u.complex = (Z_CompSpec *)
1479             odr_malloc(c->odr_out, sizeof(*compo->u.complex));
1480         compo->u.complex->selectAlternativeSyntax = (bool_t *)
1481             odr_malloc(c->odr_out, sizeof(bool_t));
1482         *compo->u.complex->selectAlternativeSyntax = 0;
1483
1484         compo->u.complex->generic = (Z_Specification *)
1485             odr_malloc(c->odr_out, sizeof(*compo->u.complex->generic));
1486
1487         compo->u.complex->generic->schema = (Odr_oid *)
1488             yaz_str_to_z3950oid (c->odr_out, CLASS_SCHEMA, schema);
1489
1490         if (!compo->u.complex->generic->schema)
1491         {
1492             /* OID wasn't a schema! Try record syntax instead. */
1493
1494             compo->u.complex->generic->schema = (Odr_oid *)
1495                 yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, schema);
1496         }
1497         if (elementSetName && *elementSetName)
1498         {
1499             compo->u.complex->generic->elementSpec = (Z_ElementSpec *)
1500                 odr_malloc(c->odr_out, sizeof(Z_ElementSpec));
1501             compo->u.complex->generic->elementSpec->which =
1502                 Z_ElementSpec_elementSetName;
1503             compo->u.complex->generic->elementSpec->u.elementSetName =
1504                 odr_strdup (c->odr_out, elementSetName);
1505         }
1506         else
1507             compo->u.complex->generic->elementSpec = 0;
1508         compo->u.complex->num_dbSpecific = 0;
1509         compo->u.complex->dbSpecific = 0;
1510         compo->u.complex->num_recordSyntax = 0;
1511         compo->u.complex->recordSyntax = 0;
1512     }
1513     else if (elementSetName && *elementSetName)
1514     {
1515         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1516             odr_malloc (c->odr_out, sizeof(*esn));
1517         Z_RecordComposition *compo = (Z_RecordComposition *)
1518             odr_malloc (c->odr_out, sizeof(*compo));
1519
1520         esn->which = Z_ElementSetNames_generic;
1521         esn->u.generic = odr_strdup (c->odr_out, elementSetName);
1522         compo->which = Z_RecordComp_simple;
1523         compo->u.simple = esn;
1524         req->recordComposition = compo;
1525     }
1526     req->resultSetId = odr_strdup(c->odr_out, resultset->setname);
1527     send_APDU (c, apdu);
1528     return 1;
1529 }
1530
1531 ZOOM_API(ZOOM_scanset)
1532 ZOOM_connection_scan (ZOOM_connection c, const char *start)
1533 {
1534     ZOOM_scanset scan = (ZOOM_scanset) xmalloc (sizeof(*scan));
1535
1536     scan->connection = c;
1537     scan->odr = odr_createmem (ODR_DECODE);
1538     scan->options = ZOOM_options_create_with_parent (c->options);
1539     scan->refcount = 1;
1540     scan->scan_response = 0;
1541
1542     if ((scan->termListAndStartPoint =
1543          p_query_scan(scan->odr, PROTO_Z3950, &scan->attributeSet,
1544                       start)))
1545     {
1546         ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_SCAN);
1547         task->u.scan.scan = scan;
1548
1549         (scan->refcount)++;
1550         if (!c->async)
1551         {
1552             while (ZOOM_event (1, &c))
1553                 ;
1554         }
1555     }
1556     return scan;
1557 }
1558
1559 ZOOM_API(void)
1560 ZOOM_scanset_destroy (ZOOM_scanset scan)
1561 {
1562     if (!scan)
1563         return;
1564     (scan->refcount)--;
1565     if (scan->refcount == 0)
1566     {
1567         odr_destroy (scan->odr);
1568
1569         ZOOM_options_destroy (scan->options);
1570         xfree (scan);
1571     }
1572 }
1573
1574 static int send_package (ZOOM_connection c)
1575 {
1576     ZOOM_Event event;
1577     if (!c->tasks)
1578         return 0;
1579     assert (c->tasks->which == ZOOM_TASK_PACKAGE);
1580
1581     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
1582     ZOOM_connection_put_event (c, event);
1583
1584     do_write_ex (c, c->tasks->u.package->buf_out,
1585                  c->tasks->u.package->len_out);
1586     return 1;
1587 }
1588
1589 static int send_scan (ZOOM_connection c)
1590 {
1591     ZOOM_scanset scan;
1592     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_scanRequest);
1593     Z_ScanRequest *req = apdu->u.scanRequest;
1594     if (!c->tasks)
1595         return 0;
1596     assert (c->tasks->which == ZOOM_TASK_SCAN);
1597     scan = c->tasks->u.scan.scan;
1598
1599     req->termListAndStartPoint = scan->termListAndStartPoint;
1600     req->attributeSet = scan->attributeSet;
1601
1602     *req->numberOfTermsRequested =
1603         ZOOM_options_get_int(scan->options, "number", 10);
1604
1605     req->preferredPositionInResponse =
1606         odr_intdup (c->odr_out,
1607                     ZOOM_options_get_int(scan->options, "position", 1));
1608
1609     req->stepSize =
1610         odr_intdup (c->odr_out,
1611                     ZOOM_options_get_int(scan->options, "stepSize", 0));
1612
1613     req->databaseNames = set_DatabaseNames (c, scan->options,
1614                                             &req->num_databaseNames);
1615
1616     send_APDU (c, apdu);
1617
1618     return 1;
1619 }
1620
1621 ZOOM_API(size_t)
1622 ZOOM_scanset_size (ZOOM_scanset scan)
1623 {
1624     if (!scan || !scan->scan_response || !scan->scan_response->entries)
1625         return 0;
1626     return scan->scan_response->entries->num_entries;
1627 }
1628
1629 ZOOM_API(const char *)
1630 ZOOM_scanset_term (ZOOM_scanset scan, size_t pos,
1631                                int *occ, int *len)
1632 {
1633     const char *term = 0;
1634     size_t noent = ZOOM_scanset_size (scan);
1635     Z_ScanResponse *res = scan->scan_response;
1636
1637     *len = 0;
1638     *occ = 0;
1639     if (pos >= noent)
1640         return 0;
1641     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
1642     {
1643         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
1644
1645         if (t->term->which == Z_Term_general)
1646         {
1647             term = (const char *) t->term->u.general->buf;
1648             *len = t->term->u.general->len;
1649         }
1650         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
1651     }
1652     return term;
1653 }
1654
1655 ZOOM_API(const char *)
1656 ZOOM_scanset_option_get (ZOOM_scanset scan, const char *key)
1657 {
1658     return ZOOM_options_get (scan->options, key);
1659 }
1660
1661 ZOOM_API(void)
1662 ZOOM_scanset_option_set (ZOOM_scanset scan, const char *key,
1663                               const char *val)
1664 {
1665     ZOOM_options_set (scan->options, key, val);
1666 }
1667
1668
1669
1670 static Z_APDU *create_es_package (ZOOM_package p, int type)
1671 {
1672     const char *str;
1673     Z_APDU *apdu = zget_APDU(p->odr_out, Z_APDU_extendedServicesRequest);
1674     Z_ExtendedServicesRequest *req = apdu->u.extendedServicesRequest;
1675
1676     *req->function = Z_ExtendedServicesRequest_create;
1677
1678     str = ZOOM_options_get(p->options, "package-name");
1679     if (str && *str)
1680         req->packageName = nmem_strdup (p->odr_out->mem, str);
1681
1682     str = ZOOM_options_get(p->options, "user-id");
1683     if (str)
1684         req->userId = nmem_strdup (p->odr_out->mem, str);
1685
1686     req->packageType = yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
1687                                               type);
1688
1689     str = ZOOM_options_get(p->options, "function");
1690     if (str)
1691     {
1692         if (!strcmp (str, "create"))
1693             *req->function = 1;
1694         if (!strcmp (str, "delete"))
1695             *req->function = 2;
1696         if (!strcmp (str, "modify"))
1697             *req->function = 3;
1698     }
1699     return apdu;
1700 }
1701
1702 static const char *ill_array_lookup (void *clientData, const char *idx)
1703 {
1704     ZOOM_package p = (ZOOM_package) clientData;
1705     return ZOOM_options_get (p->options, idx+4);
1706 }
1707
1708 static Z_External *encode_ill_request (ZOOM_package p)
1709 {
1710     ODR out = p->odr_out;
1711     ILL_Request *req;
1712     Z_External *r = 0;
1713     struct ill_get_ctl ctl;
1714
1715     ctl.odr = p->odr_out;
1716     ctl.clientData = p;
1717     ctl.f = ill_array_lookup;
1718
1719     req = ill_get_ILLRequest(&ctl, "ill", 0);
1720
1721     if (!ill_Request (out, &req, 0, 0))
1722     {
1723         int ill_request_size;
1724         char *ill_request_buf = odr_getbuf (out, &ill_request_size, 0);
1725         if (ill_request_buf)
1726             odr_setbuf (out, ill_request_buf, ill_request_size, 1);
1727         return 0;
1728     }
1729     else
1730     {
1731         oident oid;
1732         int illRequest_size = 0;
1733         char *illRequest_buf = odr_getbuf (out, &illRequest_size, 0);
1734
1735         oid.proto = PROTO_GENERAL;
1736         oid.oclass = CLASS_GENERAL;
1737         oid.value = VAL_ISO_ILL_1;
1738
1739         r = (Z_External *) odr_malloc (out, sizeof(*r));
1740         r->direct_reference = odr_oiddup(out,oid_getoidbyent(&oid));
1741         r->indirect_reference = 0;
1742         r->descriptor = 0;
1743         r->which = Z_External_single;
1744
1745         r->u.single_ASN1_type = (Odr_oct *)
1746             odr_malloc (out, sizeof(*r->u.single_ASN1_type));
1747         r->u.single_ASN1_type->buf = odr_malloc (out, illRequest_size);
1748         r->u.single_ASN1_type->len = illRequest_size;
1749         r->u.single_ASN1_type->size = illRequest_size;
1750         memcpy (r->u.single_ASN1_type->buf, illRequest_buf, illRequest_size);
1751     }
1752     return r;
1753 }
1754
1755 static Z_ItemOrder *encode_item_order(ZOOM_package p)
1756 {
1757     Z_ItemOrder *req = odr_malloc (p->odr_out, sizeof(*req));
1758     const char *str;
1759
1760     req->which=Z_IOItemOrder_esRequest;
1761     req->u.esRequest = (Z_IORequest *)
1762         odr_malloc(p->odr_out,sizeof(Z_IORequest));
1763
1764     /* to keep part ... */
1765     req->u.esRequest->toKeep = (Z_IOOriginPartToKeep *)
1766         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartToKeep));
1767     req->u.esRequest->toKeep->supplDescription = 0;
1768     req->u.esRequest->toKeep->contact =
1769         odr_malloc (p->odr_out, sizeof(*req->u.esRequest->toKeep->contact));
1770
1771     str = ZOOM_options_get(p->options, "contact-name");
1772     req->u.esRequest->toKeep->contact->name = str ?
1773         nmem_strdup (p->odr_out->mem, str) : 0;
1774
1775     str = ZOOM_options_get(p->options, "contact-phone");
1776     req->u.esRequest->toKeep->contact->phone = str ?
1777         nmem_strdup (p->odr_out->mem, str) : 0;
1778
1779     str = ZOOM_options_get(p->options, "contact-email");
1780     req->u.esRequest->toKeep->contact->email = str ?
1781         nmem_strdup (p->odr_out->mem, str) : 0;
1782
1783     req->u.esRequest->toKeep->addlBilling = 0;
1784
1785     /* not to keep part ... */
1786     req->u.esRequest->notToKeep = (Z_IOOriginPartNotToKeep *)
1787         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartNotToKeep));
1788
1789     req->u.esRequest->notToKeep->resultSetItem = (Z_IOResultSetItem *)
1790         odr_malloc(p->odr_out, sizeof(Z_IOResultSetItem));
1791
1792     str = ZOOM_options_get(p->options, "itemorder-setname");
1793     if (!str)
1794         str = "default";
1795     req->u.esRequest->notToKeep->resultSetItem->resultSetId =
1796         nmem_strdup (p->odr_out->mem, str);
1797     req->u.esRequest->notToKeep->resultSetItem->item =
1798         (int *) odr_malloc(p->odr_out, sizeof(int));
1799
1800     str = ZOOM_options_get(p->options, "itemorder-item");
1801     *req->u.esRequest->notToKeep->resultSetItem->item =
1802         (str ? atoi(str) : 1);
1803
1804     req->u.esRequest->notToKeep->itemRequest = encode_ill_request(p);
1805
1806     return req;
1807 }
1808
1809 ZOOM_API(void)
1810     ZOOM_package_send (ZOOM_package p, const char *type)
1811 {
1812     Z_APDU *apdu = 0;
1813     ZOOM_connection c;
1814     if (!p)
1815         return;
1816     c = p->connection;
1817     odr_reset (p->odr_out);
1818     xfree (p->buf_out);
1819     p->buf_out = 0;
1820     if (!strcmp(type, "itemorder"))
1821     {
1822         Z_External *r;
1823         apdu = create_es_package (p, VAL_ITEMORDER);
1824         if (apdu)
1825         {
1826             r = odr_malloc (p->odr_out, sizeof(*r));
1827
1828             r->direct_reference =
1829                 yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
1830                                        VAL_ITEMORDER);
1831             r->descriptor = 0;
1832             r->which = Z_External_itemOrder;
1833             r->indirect_reference = 0;
1834             r->u.itemOrder = encode_item_order (p);
1835
1836             apdu->u.extendedServicesRequest->taskSpecificParameters = r;
1837         }
1838     }
1839     if (apdu)
1840     {
1841         if (encode_APDU(p->connection, apdu, p->odr_out) == 0)
1842         {
1843             char *buf;
1844
1845             ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_PACKAGE);
1846             task->u.package = p;
1847             buf = odr_getbuf(p->odr_out, &p->len_out, 0);
1848             p->buf_out = xmalloc (p->len_out);
1849             memcpy (p->buf_out, buf, p->len_out);
1850
1851             (p->refcount)++;
1852             if (!c->async)
1853             {
1854                 while (ZOOM_event (1, &c))
1855                     ;
1856             }
1857         }
1858     }
1859 }
1860
1861 ZOOM_API(ZOOM_package)
1862     ZOOM_connection_package (ZOOM_connection c, ZOOM_options options)
1863 {
1864     ZOOM_package p = (ZOOM_package) xmalloc (sizeof(*p));
1865
1866     p->connection = c;
1867     p->odr_out = odr_createmem (ODR_ENCODE);
1868     p->options = ZOOM_options_create_with_parent2 (options, c->options);
1869     p->refcount = 1;
1870     p->buf_out = 0;
1871     p->len_out = 0;
1872     return p;
1873 }
1874
1875 ZOOM_API(void)
1876     ZOOM_package_destroy(ZOOM_package p)
1877 {
1878     if (!p)
1879         return;
1880     (p->refcount)--;
1881     if (p->refcount == 0)
1882     {
1883         odr_destroy (p->odr_out);
1884         xfree (p->buf_out);
1885
1886         ZOOM_options_destroy (p->options);
1887         xfree (p);
1888     }
1889 }
1890
1891 ZOOM_API(const char *)
1892 ZOOM_package_option_get (ZOOM_package p, const char *key)
1893 {
1894     return ZOOM_options_get (p->options, key);
1895 }
1896
1897 ZOOM_API(void)
1898 ZOOM_package_option_set (ZOOM_package p, const char *key,
1899                               const char *val)
1900 {
1901     ZOOM_options_set (p->options, key, val);
1902 }
1903
1904 static int ZOOM_connection_exec_task (ZOOM_connection c)
1905 {
1906     ZOOM_task task = c->tasks;
1907
1908     yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task");
1909     if (!task)
1910         return 0;
1911     if (c->error != ZOOM_ERROR_NONE ||
1912         (!c->cs && task->which != ZOOM_TASK_CONNECT))
1913     {
1914         ZOOM_connection_remove_tasks (c);
1915         return 0;
1916     }
1917     yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task type=%d run=%d",
1918              task->which, task->running);
1919     if (task->running)
1920         return 0;
1921     task->running = 1;
1922     switch (task->which)
1923     {
1924     case ZOOM_TASK_SEARCH:
1925         /* see if search hasn't been sent yet. */
1926         if (ZOOM_connection_send_search (c))
1927             return 1;
1928         break;
1929     case ZOOM_TASK_RETRIEVE:
1930         if (send_present (c))
1931             return 1;
1932         break;
1933     case ZOOM_TASK_CONNECT:
1934         if (do_connect(c))
1935             return 1;
1936         break;
1937     case ZOOM_TASK_SCAN:
1938         if (send_scan(c))
1939             return 1;
1940         break;
1941     case ZOOM_TASK_PACKAGE:
1942         if (send_package(c))
1943             return 1;
1944     }
1945     ZOOM_connection_remove_task (c);
1946     return 0;
1947 }
1948
1949 static int send_sort_present (ZOOM_connection c)
1950 {
1951     int r = send_sort (c);
1952     if (!r)
1953         r = send_present (c);
1954     return r;
1955 }
1956
1957 static int es_response (ZOOM_connection c,
1958                         Z_ExtendedServicesResponse *res)
1959 {
1960     if (!c->tasks || c->tasks->which != ZOOM_TASK_PACKAGE)
1961         return 0;
1962     if (res->diagnostics && res->num_diagnostics > 0)
1963         response_diag(c, res->diagnostics[0]);
1964     if (res->taskPackage &&
1965         res->taskPackage->which == Z_External_extendedService)
1966     {
1967         Z_TaskPackage *taskPackage = res->taskPackage->u.extendedService;
1968         Odr_oct *id = taskPackage->targetReference;
1969
1970         if (id)
1971             ZOOM_options_setl (c->tasks->u.package->options,
1972                                "targetReference", id->buf, id->len);
1973     }
1974     return 1;
1975 }
1976
1977
1978 static void handle_apdu (ZOOM_connection c, Z_APDU *apdu)
1979 {
1980     Z_InitResponse *initrs;
1981
1982     c->mask = 0;
1983     yaz_log (LOG_DEBUG, "hande_apdu type=%d", apdu->which);
1984     switch(apdu->which)
1985     {
1986     case Z_APDU_initResponse:
1987         initrs = apdu->u.initResponse;
1988         if (!*initrs->result)
1989         {
1990             c->error = ZOOM_ERROR_INIT;
1991         }
1992         else
1993         {
1994             char *cookie =
1995                 yaz_oi_get_string_oidval (&apdu->u.initResponse->otherInfo,
1996                                           VAL_COOKIE, 1, 0);
1997             xfree (c->cookie_in);
1998             c->cookie_in = 0;
1999             if (cookie)
2000                 c->cookie_in = xstrdup(cookie);
2001             if (ODR_MASK_GET(initrs->options, Z_Options_namedResultSets) &&
2002                 ODR_MASK_GET(initrs->protocolVersion, Z_ProtocolVersion_3))
2003                 c->support_named_resultsets = 1;
2004             if (c->tasks)
2005             {
2006                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2007                 ZOOM_connection_remove_task (c);
2008             }
2009             ZOOM_connection_exec_task (c);
2010         }
2011         if (ODR_MASK_GET(initrs->options, Z_Options_negotiationModel))
2012         {
2013             NMEM tmpmem = nmem_create();
2014             Z_CharSetandLanguageNegotiation *p =
2015                 yaz_get_charneg_record(initrs->otherInfo);
2016
2017             if (p)
2018             {
2019                 char *charset=NULL, *lang=NULL;
2020                 int selected;
2021
2022                 yaz_get_response_charneg(tmpmem, p, &charset, &lang, &selected);
2023                 yaz_log(LOG_DEBUG, "Target accepted: charset - %s,"
2024                         "language - %s, select - %d",
2025                         charset, lang, selected);
2026
2027                 nmem_destroy(tmpmem);
2028             }
2029         }
2030         break;
2031     case Z_APDU_searchResponse:
2032         handle_search_response (c, apdu->u.searchResponse);
2033         if (!send_sort_present (c))
2034             ZOOM_connection_remove_task (c);
2035         break;
2036     case Z_APDU_presentResponse:
2037         handle_present_response (c, apdu->u.presentResponse);
2038         if (!send_present (c))
2039             ZOOM_connection_remove_task (c);
2040         break;
2041     case Z_APDU_sortResponse:
2042         sort_response (c, apdu->u.sortResponse);
2043         if (!send_present (c))
2044             ZOOM_connection_remove_task (c);
2045         break;
2046     case Z_APDU_scanResponse:
2047         scan_response (c, apdu->u.scanResponse);
2048         ZOOM_connection_remove_task (c);
2049         break;
2050     case Z_APDU_extendedServicesResponse:
2051         es_response (c, apdu->u.extendedServicesResponse);
2052         ZOOM_connection_remove_task (c);
2053         break;
2054     case Z_APDU_close:
2055         if (c->reconnect_ok)
2056         {
2057             do_close(c);
2058             c->tasks->running = 0;
2059             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2060         }
2061         else
2062         {
2063             c->error = ZOOM_ERROR_CONNECTION_LOST;
2064             do_close(c);
2065         }
2066         break;
2067     default:
2068         c->error = ZOOM_ERROR_DECODE;
2069         do_close(c);
2070     }
2071 }
2072
2073 static int do_read (ZOOM_connection c)
2074 {
2075     int r;
2076     Z_APDU *apdu;
2077     ZOOM_Event event;
2078
2079     event = ZOOM_Event_create (ZOOM_EVENT_RECV_DATA);
2080     ZOOM_connection_put_event (c, event);
2081
2082     yaz_log (LOG_DEBUG, "do_read len=%d", c->len_in);
2083
2084     r = cs_get (c->cs, &c->buf_in, &c->len_in);
2085     if (r == 1)
2086         return 0;
2087     if (r <= 0)
2088     {
2089         if (c->reconnect_ok)
2090         {
2091             do_close (c);
2092             c->reconnect_ok = 0;
2093             yaz_log (LOG_DEBUG, "reconnect read");
2094             c->tasks->running = 0;
2095             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2096         }
2097         else
2098         {
2099             c->error= ZOOM_ERROR_CONNECTION_LOST;
2100             do_close (c);
2101         }
2102     }
2103     else
2104     {
2105         ZOOM_Event event;
2106         odr_reset (c->odr_in);
2107         odr_setbuf (c->odr_in, c->buf_in, r, 0);
2108         event = ZOOM_Event_create (ZOOM_EVENT_RECV_APDU);
2109         ZOOM_connection_put_event (c, event);
2110         if (!z_APDU (c->odr_in, &apdu, 0, 0))
2111         {
2112             c->error = ZOOM_ERROR_DECODE;
2113             do_close (c);
2114         }
2115         else
2116             handle_apdu (c, apdu);
2117         c->reconnect_ok = 0;
2118     }
2119     return 1;
2120 }
2121
2122 static int do_write_ex (ZOOM_connection c, char *buf_out, int len_out)
2123 {
2124     int r;
2125     ZOOM_Event event;
2126
2127     event = ZOOM_Event_create(ZOOM_EVENT_SEND_DATA);
2128     ZOOM_connection_put_event (c, event);
2129
2130     yaz_log (LOG_DEBUG, "do_write_ex len=%d", len_out);
2131     if ((r=cs_put (c->cs, buf_out, len_out)) < 0)
2132     {
2133         if (c->reconnect_ok)
2134         {
2135             do_close (c);
2136             c->reconnect_ok = 0;
2137             yaz_log (LOG_DEBUG, "reconnect write");
2138             c->tasks->running = 0;
2139             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2140             return 0;
2141         }
2142         if (c->state == STATE_CONNECTING)
2143             c->error = ZOOM_ERROR_CONNECT;
2144         else
2145             c->error = ZOOM_ERROR_CONNECTION_LOST;
2146         do_close (c);
2147         return 1;
2148     }
2149     else if (r == 1)
2150     {
2151         c->mask = ZOOM_SELECT_EXCEPT;
2152         if (c->cs->io_pending & CS_WANT_WRITE)
2153             c->mask += ZOOM_SELECT_WRITE;
2154         if (c->cs->io_pending & CS_WANT_READ)
2155             c->mask += ZOOM_SELECT_READ;
2156         yaz_log (LOG_DEBUG, "do_write_ex 1 mask=%d", c->mask);
2157     }
2158     else
2159     {
2160         // c->reconnect_ok = 0;
2161         c->mask = ZOOM_SELECT_READ|ZOOM_SELECT_EXCEPT;
2162         yaz_log (LOG_DEBUG, "do_write_ex 2 mask=%d", c->mask);
2163     }
2164     return 0;
2165 }
2166
2167 static int do_write(ZOOM_connection c)
2168 {
2169     return do_write_ex (c, c->buf_out, c->len_out);
2170 }
2171
2172
2173 ZOOM_API(const char *)
2174 ZOOM_connection_option_get (ZOOM_connection c, const char *key)
2175 {
2176     return ZOOM_options_get (c->options, key);
2177 }
2178
2179 ZOOM_API(void)
2180 ZOOM_connection_option_set (ZOOM_connection c, const char *key,
2181                                   const char *val)
2182 {
2183     ZOOM_options_set (c->options, key, val);
2184 }
2185
2186 ZOOM_API(const char *)
2187 ZOOM_resultset_option_get (ZOOM_resultset r, const char *key)
2188 {
2189     return ZOOM_options_get (r->options, key);
2190 }
2191
2192 ZOOM_API(void)
2193 ZOOM_resultset_option_set (ZOOM_resultset r, const char *key,
2194                                   const char *val)
2195 {
2196     ZOOM_options_set (r->options, key, val);
2197 }
2198
2199
2200 ZOOM_API(int)
2201 ZOOM_connection_errcode (ZOOM_connection c)
2202 {
2203     return ZOOM_connection_error (c, 0, 0);
2204 }
2205
2206 ZOOM_API(const char *)
2207 ZOOM_connection_errmsg (ZOOM_connection c)
2208 {
2209     const char *msg;
2210     ZOOM_connection_error (c, &msg, 0);
2211     return msg;
2212 }
2213
2214 ZOOM_API(const char *)
2215 ZOOM_connection_addinfo (ZOOM_connection c)
2216 {
2217     const char *addinfo;
2218     ZOOM_connection_error (c, 0, &addinfo);
2219     return addinfo;
2220 }
2221
2222 ZOOM_API(int)
2223 ZOOM_connection_error (ZOOM_connection c, const char **cp,
2224                             const char **addinfo)
2225 {
2226     int error = c->error;
2227     if (cp)
2228     {
2229         switch (error)
2230         {
2231         case ZOOM_ERROR_NONE:
2232             *cp = "No error"; break;
2233         case ZOOM_ERROR_CONNECT:
2234             *cp = "Connect failed"; break;
2235         case ZOOM_ERROR_MEMORY:
2236             *cp = "Out of memory"; break;
2237         case ZOOM_ERROR_ENCODE:
2238             *cp = "Encoding failed"; break;
2239         case ZOOM_ERROR_DECODE:
2240             *cp = "Decoding failed"; break;
2241         case ZOOM_ERROR_CONNECTION_LOST:
2242             *cp = "Connection lost"; break;
2243         case ZOOM_ERROR_INIT:
2244             *cp = "Init rejected"; break;
2245         case ZOOM_ERROR_INTERNAL:
2246             *cp = "Internal failure"; break;
2247         case ZOOM_ERROR_TIMEOUT:
2248             *cp = "Timeout"; break;
2249         default:
2250             *cp = diagbib1_str (error);
2251         }
2252     }
2253     if (addinfo)
2254     {
2255         if (c->addinfo)
2256             *addinfo = c->addinfo;
2257         else
2258             *addinfo = "";
2259     }
2260     return c->error;
2261 }
2262
2263 static int ZOOM_connection_do_io(ZOOM_connection c, int mask)
2264 {
2265     ZOOM_Event event = 0;
2266     int r = cs_look(c->cs);
2267     yaz_log (LOG_DEBUG, "ZOOM_connection_do_io c=%p mask=%d cs_look=%d",
2268              c, mask, r);
2269
2270     if (r == CS_NONE)
2271     {
2272         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2273         c->error = ZOOM_ERROR_CONNECT;
2274         do_close (c);
2275         ZOOM_connection_put_event (c, event);
2276     }
2277     else if (r == CS_CONNECT)
2278     {
2279         int ret;
2280         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2281
2282         ret = cs_rcvconnect (c->cs);
2283         yaz_log (LOG_DEBUG, "cs_rcvconnect returned %d", ret);
2284         if (ret == 1)
2285         {
2286             c->mask = ZOOM_SELECT_EXCEPT;
2287             if (c->cs->io_pending & CS_WANT_WRITE)
2288                 c->mask += ZOOM_SELECT_WRITE;
2289             if (c->cs->io_pending & CS_WANT_READ)
2290                 c->mask += ZOOM_SELECT_READ;
2291             ZOOM_connection_put_event (c, event);
2292         }
2293         else if (ret == 0)
2294         {
2295             ZOOM_connection_put_event (c, event);
2296             ZOOM_connection_send_init (c);
2297             c->state = STATE_ESTABLISHED;
2298         }
2299         else
2300         {
2301             c->error = ZOOM_ERROR_CONNECT;
2302             do_close (c);
2303             ZOOM_connection_put_event (c, event);
2304         }
2305     }
2306     else
2307     {
2308         if (mask & ZOOM_SELECT_READ)
2309             do_read (c);
2310         if (c->cs && (mask & ZOOM_SELECT_WRITE))
2311             do_write (c);
2312     }
2313     return 1;
2314 }
2315
2316 ZOOM_API(int)
2317 ZOOM_connection_last_event(ZOOM_connection cs)
2318 {
2319     if (!cs)
2320         return ZOOM_EVENT_NONE;
2321     return cs->last_event;
2322 }
2323
2324 ZOOM_API(int)
2325 ZOOM_event (int no, ZOOM_connection *cs)
2326 {
2327     int timeout = 5000;
2328 #if HAVE_SYS_POLL_H
2329     struct pollfd pollfds[1024];
2330     ZOOM_connection poll_cs[1024];
2331 #else
2332     struct timeval tv;
2333     fd_set input, output, except;
2334 #endif
2335     int i, r, nfds;
2336     int max_fd = 0;
2337
2338     for (i = 0; i<no; i++)
2339     {
2340         ZOOM_connection c = cs[i];
2341         ZOOM_Event event;
2342         if (c && (event = ZOOM_connection_get_event(c)))
2343         {
2344             ZOOM_Event_destroy (event);
2345             return i+1;
2346         }
2347     }
2348     for (i = 0; i<no; i++)
2349     {
2350         ZOOM_connection c = cs[i];
2351         ZOOM_Event event;
2352         if (c && ZOOM_connection_exec_task (c))
2353         {
2354             if ((event = ZOOM_connection_get_event(c)))
2355             {
2356                 ZOOM_Event_destroy (event);
2357                 return i+1;
2358             }
2359         }
2360     }
2361 #if HAVE_SYS_POLL_H
2362
2363 #else
2364     FD_ZERO (&input);
2365     FD_ZERO (&output);
2366     FD_ZERO (&except);
2367 #endif
2368     nfds = 0;
2369     for (i = 0; i<no; i++)
2370     {
2371         ZOOM_connection c = cs[i];
2372         int fd, mask;
2373         int this_timeout;
2374
2375         if (!c)
2376             continue;
2377         fd = z3950_connection_socket(c);
2378         mask = z3950_connection_mask(c);
2379
2380         if (fd == -1)
2381             continue;
2382         if (max_fd < fd)
2383             max_fd = fd;
2384
2385         this_timeout = ZOOM_options_get_int (c->options, "timeout", -1);
2386         if (this_timeout != -1 && this_timeout < timeout)
2387             timeout = this_timeout;
2388 #if HAVE_SYS_POLL_H
2389         if (mask)
2390         {
2391             short poll_events = 0;
2392
2393             if (mask & ZOOM_SELECT_READ)
2394                 poll_events += POLLIN;
2395             if (mask & ZOOM_SELECT_WRITE)
2396                 poll_events += POLLOUT;
2397             if (mask & ZOOM_SELECT_EXCEPT)
2398                 poll_events += POLLERR;
2399             pollfds[nfds].fd = fd;
2400             pollfds[nfds].events = poll_events;
2401             pollfds[nfds].revents = 0;
2402             poll_cs[nfds] = c;
2403             nfds++;
2404         }
2405 #else
2406         if (mask & ZOOM_SELECT_READ)
2407         {
2408             FD_SET (fd, &input);
2409             nfds++;
2410         }
2411         if (mask & ZOOM_SELECT_WRITE)
2412         {
2413             FD_SET (fd, &output);
2414             nfds++;
2415         }
2416         if (mask & ZOOM_SELECT_EXCEPT)
2417         {
2418             FD_SET (fd, &except);
2419             nfds++;
2420         }
2421 #endif
2422     }
2423     if (timeout >= 5000)
2424         timeout = 30;
2425
2426     if (!nfds)
2427         return 0;
2428
2429 #if HAVE_SYS_POLL_H
2430     r = poll (pollfds, nfds, timeout * 1000);
2431     for (i = 0; i<nfds; i++)
2432     {
2433         ZOOM_connection c = poll_cs[i];
2434         if (r && c->mask)
2435         {
2436             int mask = 0;
2437             if (pollfds[i].revents & POLLIN)
2438                 mask += ZOOM_SELECT_READ;
2439             if (pollfds[i].revents & POLLOUT)
2440                 mask += ZOOM_SELECT_WRITE;
2441             if (pollfds[i].revents & POLLERR)
2442                 mask += ZOOM_SELECT_EXCEPT;
2443             if (mask)
2444                 ZOOM_connection_do_io(c, mask);
2445         }
2446         else if (r == 0 && c->mask)
2447         {
2448             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
2449             /* timeout and this connection was waiting */
2450             c->error = ZOOM_ERROR_TIMEOUT;
2451             do_close (c);
2452             ZOOM_connection_put_event(c, event);
2453         }
2454     }
2455 #else
2456     tv.tv_sec = timeout;
2457     tv.tv_usec = 0;
2458     yaz_log (LOG_DEBUG, "select start");
2459     r = select (max_fd+1, &input, &output, &except, &tv);
2460     yaz_log (LOG_DEBUG, "select stop, returned r=%d", r);
2461     for (i = 0; i<no; i++)
2462     {
2463         ZOOM_connection c = cs[i];
2464         int fd, mask;
2465
2466         if (!c)
2467             continue;
2468         fd = z3950_connection_socket(c);
2469         mask = 0;
2470         if (r && c->mask)
2471         {
2472             /* no timeout and real socket */
2473             if (FD_ISSET(fd, &input))
2474                 mask += ZOOM_SELECT_READ;
2475             if (FD_ISSET(fd, &output))
2476                 mask += ZOOM_SELECT_WRITE;
2477             if (FD_ISSET(fd, &except))
2478                 mask += ZOOM_SELECT_EXCEPT;
2479             if (mask)
2480                 ZOOM_connection_do_io(c, mask);
2481         }
2482         if (r == 0 && c->mask)
2483         {
2484             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
2485             /* timeout and this connection was waiting */
2486             c->error = ZOOM_ERROR_TIMEOUT;
2487             do_close (c);
2488             yaz_log (LOG_DEBUG, "timeout");
2489             ZOOM_connection_put_event(c, event);
2490         }
2491     }
2492 #endif
2493     for (i = 0; i<no; i++)
2494     {
2495         ZOOM_connection c = cs[i];
2496         ZOOM_Event event;
2497         if (c && (event = ZOOM_connection_get_event(c)))
2498         {
2499             ZOOM_Event_destroy (event);
2500             return i+1;
2501         }
2502     }
2503     return 0;
2504 }