zutil/zoom-c.c

   1 /*
   2  * $Id: zoom-c.c,v 1.8 2002-11-30 22:30:51 mike 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 typedef enum {
  22     zoom_pending,
  23     zoom_complete
  24 } zoom_ret;
  25
  26
  27 static zoom_ret ZOOM_connection_send_init (ZOOM_connection c);
  28 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out);
  29
  30 static ZOOM_Event ZOOM_Event_create (int kind)
  31 {
  32     ZOOM_Event event = (ZOOM_Event) xmalloc (sizeof(*event));
  33     event->kind = kind;
  34     event->next = 0;
  35     event->prev = 0;
  36     return event;
  37 }
  38
  39 static void ZOOM_Event_destroy (ZOOM_Event event)
  40 {
  41     xfree (event);
  42 }
  43
  44 static void ZOOM_connection_put_event (ZOOM_connection c, ZOOM_Event event)
  45 {
  46     if (c->m_queue_back)
  47     {
  48         c->m_queue_back->prev = event;
  49         assert (c->m_queue_front);
  50     }
  51     else
  52     {
  53         assert (!c->m_queue_front);
  54         c->m_queue_front = event;
  55     }
  56     event->next = c->m_queue_back;
  57     event->prev = 0;
  58     c->m_queue_back = event;
  59 }
  60
  61 static ZOOM_Event ZOOM_connection_get_event(ZOOM_connection c)
  62 {
  63     ZOOM_Event event = c->m_queue_front;
  64     if (!event)
  65         return 0;
  66     assert (c->m_queue_back);
  67     c->m_queue_front = event->prev;
  68     if (c->m_queue_front)
  69     {
  70         assert (c->m_queue_back);
  71         c->m_queue_front->next = 0;
  72     }
  73     else
  74         c->m_queue_back = 0;
  75     c->last_event = event->kind;
  76     return event;
  77 }
  78
  79 static void clear_error (ZOOM_connection c)
  80 {
  81
  82     switch (c->error)
  83     {
  84     case ZOOM_ERROR_CONNECT:
  85     case ZOOM_ERROR_MEMORY:
  86     case ZOOM_ERROR_DECODE:
  87     case ZOOM_ERROR_CONNECTION_LOST:
  88     case ZOOM_ERROR_INIT:
  89     case ZOOM_ERROR_INTERNAL:
  90         break;
  91     default:
  92         c->error = ZOOM_ERROR_NONE;
  93         xfree (c->addinfo);
  94         c->addinfo = 0;
  95     }
  96 }
  97
  98 ZOOM_task ZOOM_connection_add_task (ZOOM_connection c, int which)
  99 {
 100     ZOOM_task *taskp = &c->tasks;
 101     while (*taskp)
 102         taskp = &(*taskp)->next;
 103     *taskp = (ZOOM_task) xmalloc (sizeof(**taskp));
 104     (*taskp)->running = 0;
 105     (*taskp)->which = which;
 106     (*taskp)->next = 0;
 107     clear_error (c);
 108     return *taskp;
 109 }
 110
 111 ZOOM_task ZOOM_connection_insert_task (ZOOM_connection c, int which)
 112 {
 113     ZOOM_task task = (ZOOM_task) xmalloc (sizeof(*task));
 114
 115     task->next = c->tasks;
 116     c->tasks = task;
 117
 118     task->running = 0;
 119     task->which = which;
 120     clear_error (c);
 121     return task;
 122 }
 123
 124 void ZOOM_connection_remove_task (ZOOM_connection c)
 125 {
 126     ZOOM_task task = c->tasks;
 127
 128     if (task)
 129     {
 130         c->tasks = task->next;
 131         switch (task->which)
 132         {
 133         case ZOOM_TASK_SEARCH:
 134             ZOOM_resultset_destroy (task->u.search.resultset);
 135             break;
 136         case ZOOM_TASK_RETRIEVE:
 137             ZOOM_resultset_destroy (task->u.retrieve.resultset);
 138             break;
 139         case ZOOM_TASK_CONNECT:
 140             break;
 141         case ZOOM_TASK_SCAN:
 142             ZOOM_scanset_destroy (task->u.scan.scan);
 143             break;
 144         case ZOOM_TASK_PACKAGE:
 145             ZOOM_package_destroy (task->u.package);
 146             break;
 147         default:
 148             assert (0);
 149         }
 150         xfree (task);
 151     }
 152 }
 153
 154 void ZOOM_connection_remove_tasks (ZOOM_connection c)
 155 {
 156     while (c->tasks)
 157         ZOOM_connection_remove_task(c);
 158 }
 159
 160 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos);
 161
 162 ZOOM_API(ZOOM_connection)
 163 ZOOM_connection_create (ZOOM_options options)
 164 {
 165     ZOOM_connection c = (ZOOM_connection) xmalloc (sizeof(*c));
 166
 167     c->cs = 0;
 168     c->mask = 0;
 169     c->reconnect_ok = 0;
 170     c->state = STATE_IDLE;
 171     c->error = ZOOM_ERROR_NONE;
 172     c->addinfo = 0;
 173     c->buf_in = 0;
 174     c->len_in = 0;
 175     c->buf_out = 0;
 176     c->len_out = 0;
 177     c->resultsets = 0;
 178
 179     c->options = ZOOM_options_create_with_parent(options);
 180
 181     c->host_port = 0;
 182     c->proxy = 0;
 183
 184     c->charset = c->lang = 0;
 185
 186     c->cookie_out = 0;
 187     c->cookie_in = 0;
 188     c->client_IP = 0;
 189     c->tasks = 0;
 190
 191     c->odr_in = odr_createmem (ODR_DECODE);
 192     c->odr_out = odr_createmem (ODR_ENCODE);
 193
 194     c->async = 0;
 195     c->support_named_resultsets = 0;
 196     c->last_event = ZOOM_EVENT_NONE;
 197
 198     c->m_queue_front = 0;
 199     c->m_queue_back = 0;
 200     return c;
 201 }
 202
 203 /* set database names. Take local databases (if set); otherwise
 204    take databases given in ZURL (if set); otherwise use Default */
 205 static char **set_DatabaseNames (ZOOM_connection con, ZOOM_options options,
 206                                  int *num)
 207 {
 208     char **databaseNames;
 209     const char *c;
 210     int no = 2;
 211     const char *cp = ZOOM_options_get (options, "databaseName");
 212
 213     if (!cp || !*cp)
 214     {
 215         if (strncmp (con->host_port, "unix:", 5) == 0)
 216             cp = strchr (con->host_port+5, ':');
 217         else
 218             cp = strchr (con->host_port, '/');
 219         if (cp)
 220             cp++;
 221     }
 222     if (cp)
 223     {
 224         c = cp;
 225         while ((c = strchr(c, '+')))
 226         {
 227             c++;
 228             no++;
 229         }
 230     }
 231     else
 232         cp = "Default";
 233     databaseNames = (char**)
 234         odr_malloc (con->odr_out, no * sizeof(*databaseNames));
 235     no = 0;
 236     while (*cp)
 237     {
 238         c = strchr (cp, '+');
 239         if (!c)
 240             c = cp + strlen(cp);
 241         else if (c == cp)
 242         {
 243             cp++;
 244             continue;
 245         }
 246         /* cp ptr to first char of db name, c is char
 247            following db name */
 248         databaseNames[no] = (char*) odr_malloc (con->odr_out, 1+c-cp);
 249         memcpy (databaseNames[no], cp, c-cp);
 250         databaseNames[no++][c-cp] = '\0';
 251         cp = c;
 252         if (*cp)
 253             cp++;
 254     }
 255     databaseNames[no] = NULL;
 256     *num = no;
 257     return databaseNames;
 258 }
 259
 260 ZOOM_API(ZOOM_connection)
 261 ZOOM_connection_new (const char *host, int portnum)
 262 {
 263     ZOOM_connection c = ZOOM_connection_create (0);
 264
 265     ZOOM_connection_connect (c, host, portnum);
 266     return c;
 267 }
 268
 269 ZOOM_API(void)
 270 ZOOM_connection_connect(ZOOM_connection c,
 271                         const char *host, int portnum)
 272 {
 273     const char *val;
 274     ZOOM_task task;
 275
 276     if (c->cs)
 277     {
 278         yaz_log (LOG_DEBUG, "reconnect");
 279         c->reconnect_ok = 1;
 280         return;
 281     }
 282     yaz_log(LOG_DEBUG, "connect");
 283     xfree (c->proxy);
 284     val = ZOOM_options_get (c->options, "proxy");
 285     if (val && *val)
 286         c->proxy = xstrdup (val);
 287     else
 288         c->proxy = 0;
 289
 290     xfree (c->charset);
 291     val = ZOOM_options_get (c->options, "charset");
 292     if (val && *val)
 293         c->charset = xstrdup (val);
 294     else
 295         c->charset = 0;
 296
 297     xfree (c->lang);
 298     val = ZOOM_options_get (c->options, "lang");
 299     if (val && *val)
 300         c->lang = xstrdup (val);
 301     else
 302         c->lang = 0;
 303
 304     xfree (c->host_port);
 305     if (portnum)
 306     {
 307         char hostn[128];
 308         sprintf (hostn, "%.80s:%d", host, portnum);
 309         c->host_port = xstrdup(hostn);
 310     }
 311     else
 312         c->host_port = xstrdup(host);
 313
 314     ZOOM_options_set(c->options, "host", c->host_port);
 315
 316     val = ZOOM_options_get (c->options, "cookie");
 317     if (val && *val)
 318         c->cookie_out = xstrdup (val);
 319
 320     val = ZOOM_options_get (c->options, "clientIP");
 321     if (val && *val)
 322         c->client_IP = xstrdup (val);
 323
 324     c->async = ZOOM_options_get_bool (c->options, "async", 0);
 325
 326     c->error = ZOOM_ERROR_NONE;
 327
 328     task = ZOOM_connection_add_task (c, ZOOM_TASK_CONNECT);
 329
 330     if (!c->async)
 331     {
 332         while (ZOOM_event (1, &c))
 333             ;
 334     }
 335 }
 336
 337 ZOOM_API(ZOOM_query)
 338 ZOOM_query_create(void)
 339 {
 340     ZOOM_query s = (ZOOM_query) xmalloc (sizeof(*s));
 341
 342     s->refcount = 1;
 343     s->query = 0;
 344     s->sort_spec = 0;
 345     s->odr = odr_createmem (ODR_ENCODE);
 346
 347     return s;
 348 }
 349
 350 ZOOM_API(void)
 351 ZOOM_query_destroy(ZOOM_query s)
 352 {
 353     if (!s)
 354         return;
 355
 356     (s->refcount)--;
 357     yaz_log (LOG_DEBUG, "ZOOM_query_destroy count=%d", s->refcount);
 358     if (s->refcount == 0)
 359     {
 360         odr_destroy (s->odr);
 361         xfree (s);
 362     }
 363 }
 364
 365 ZOOM_API(int)
 366 ZOOM_query_prefix(ZOOM_query s, const char *str)
 367 {
 368     s->query = (Z_Query *) odr_malloc (s->odr, sizeof(*s->query));
 369     s->query->which = Z_Query_type_1;
 370     s->query->u.type_1 =  p_query_rpn(s->odr, PROTO_Z3950, str);
 371     if (!s->query->u.type_1)
 372         return -1;
 373     return 0;
 374 }
 375
 376 ZOOM_API(int)
 377 ZOOM_query_sortby(ZOOM_query s, const char *criteria)
 378 {
 379     s->sort_spec = yaz_sort_spec (s->odr, criteria);
 380     if (!s->sort_spec)
 381         return -1;
 382     return 0;
 383 }
 384
 385 static zoom_ret do_write(ZOOM_connection c);
 386
 387 ZOOM_API(void)
 388 ZOOM_connection_destroy(ZOOM_connection c)
 389 {
 390     ZOOM_resultset r;
 391     if (!c)
 392         return;
 393     if (c->cs)
 394         cs_close (c->cs);
 395     for (r = c->resultsets; r; r = r->next)
 396         r->connection = 0;
 397
 398     xfree (c->buf_in);
 399     xfree (c->addinfo);
 400     odr_destroy (c->odr_in);
 401     odr_destroy (c->odr_out);
 402     ZOOM_options_destroy (c->options);
 403     ZOOM_connection_remove_tasks (c);
 404     xfree (c->host_port);
 405     xfree (c->proxy);
 406     xfree (c->charset);
 407     xfree (c->lang);
 408     xfree (c->cookie_out);
 409     xfree (c->cookie_in);
 410     xfree (c->client_IP);
 411     xfree (c);
 412 }
 413
 414 void ZOOM_resultset_addref (ZOOM_resultset r)
 415 {
 416     if (r)
 417     {
 418         (r->refcount)++;
 419         yaz_log (LOG_DEBUG, "ZOOM_resultset_addref r=%p count=%d",
 420                  r, r->refcount);
 421     }
 422 }
 423 ZOOM_resultset ZOOM_resultset_create ()
 424 {
 425     ZOOM_resultset r = (ZOOM_resultset) xmalloc (sizeof(*r));
 426
 427     yaz_log (LOG_DEBUG, "ZOOM_resultset_create r = %p", r);
 428     r->refcount = 1;
 429     r->size = 0;
 430     r->odr = odr_createmem (ODR_ENCODE);
 431     r->start = 0;
 432     r->piggyback = 1;
 433     r->setname = 0;
 434     r->count = 0;
 435     r->record_cache = 0;
 436     r->r_sort_spec = 0;
 437     r->r_query = 0;
 438     r->search = 0;
 439     r->connection = 0;
 440     r->next = 0;
 441     return r;
 442 }
 443
 444 ZOOM_API(ZOOM_resultset)
 445 ZOOM_connection_search_pqf(ZOOM_connection c, const char *q)
 446 {
 447     ZOOM_resultset r;
 448     ZOOM_query s = ZOOM_query_create();
 449
 450     ZOOM_query_prefix (s, q);
 451
 452     r = ZOOM_connection_search (c, s);
 453     ZOOM_query_destroy (s);
 454     return r;
 455 }
 456
 457 ZOOM_API(ZOOM_resultset)
 458 ZOOM_connection_search(ZOOM_connection c, ZOOM_query q)
 459 {
 460     ZOOM_resultset r = ZOOM_resultset_create ();
 461     ZOOM_task task;
 462     const char *cp;
 463
 464     r->r_sort_spec = q->sort_spec;
 465     r->r_query = q->query;
 466     r->search = q;
 467
 468     r->options = ZOOM_options_create_with_parent(c->options);
 469
 470     r->start = ZOOM_options_get_int(r->options, "start", 0);
 471     r->count = ZOOM_options_get_int(r->options, "count", 0);
 472     r->piggyback = ZOOM_options_get_bool (r->options, "piggyback", 1);
 473     cp = ZOOM_options_get (r->options, "setname");
 474     if (cp)
 475         r->setname = xstrdup (cp);
 476
 477     r->connection = c;
 478
 479     r->next = c->resultsets;
 480     c->resultsets = r;
 481
 482     task = ZOOM_connection_add_task (c, ZOOM_TASK_SEARCH);
 483     task->u.search.resultset = r;
 484     ZOOM_resultset_addref (r);
 485
 486     (q->refcount)++;
 487
 488     if (!c->async)
 489     {
 490         while (ZOOM_event (1, &c))
 491             ;
 492     }
 493     return r;
 494 }
 495
 496 ZOOM_API(void)
 497 ZOOM_resultset_destroy(ZOOM_resultset r)
 498 {
 499     if (!r)
 500         return;
 501     (r->refcount)--;
 502     yaz_log (LOG_DEBUG, "ZOOM_resultset_destroy r = %p count=%d",
 503              r, r->refcount);
 504     if (r->refcount == 0)
 505     {
 506         ZOOM_record_cache rc;
 507
 508         for (rc = r->record_cache; rc; rc = rc->next)
 509             if (rc->rec.wrbuf_marc)
 510                 wrbuf_free (rc->rec.wrbuf_marc, 1);
 511         if (r->connection)
 512         {
 513             /* remove ourselves from the resultsets in connection */
 514             ZOOM_resultset *rp = &r->connection->resultsets;
 515             while (1)
 516             {
 517                 assert (*rp);   /* we must be in this list!! */
 518                 if (*rp == r)
 519                 {   /* OK, we're here - take us out of it */
 520                     *rp = (*rp)->next;
 521                     break;
 522                 }
 523                 rp = &(*rp)->next;
 524             }
 525         }
 526         ZOOM_query_destroy (r->search);
 527         ZOOM_options_destroy (r->options);
 528         odr_destroy (r->odr);
 529         xfree (r->setname);
 530         xfree (r);
 531     }
 532 }
 533
 534 ZOOM_API(size_t)
 535 ZOOM_resultset_size (ZOOM_resultset r)
 536 {
 537     return r->size;
 538 }
 539
 540 static void do_close (ZOOM_connection c)
 541 {
 542     if (c->cs)
 543         cs_close(c->cs);
 544     c->cs = 0;
 545     c->mask = 0;
 546     c->state = STATE_IDLE;
 547 }
 548
 549 static void ZOOM_resultset_retrieve (ZOOM_resultset r,
 550                                      int force_sync, int start, int count)
 551 {
 552     ZOOM_task task;
 553     ZOOM_connection c;
 554
 555     if (!r)
 556         return;
 557     c = r->connection;
 558     if (!c)
 559         return;
 560     task = ZOOM_connection_add_task (c, ZOOM_TASK_RETRIEVE);
 561     task->u.retrieve.resultset = r;
 562     task->u.retrieve.start = start;
 563     task->u.retrieve.count = count;
 564
 565     ZOOM_resultset_addref (r);
 566
 567     if (!r->connection->async || force_sync)
 568         while (r->connection && ZOOM_event (1, &r->connection))
 569             ;
 570 }
 571
 572 ZOOM_API(void)
 573 ZOOM_resultset_records (ZOOM_resultset r, ZOOM_record *recs,
 574                         size_t start, size_t count)
 575 {
 576     int force_present = 0;
 577
 578     if (!r)
 579         return ;
 580     if (count && recs)
 581         force_present = 1;
 582     ZOOM_resultset_retrieve (r, force_present, start, count);
 583     if (force_present)
 584     {
 585         size_t i;
 586         for (i = 0; i< count; i++)
 587             recs[i] = ZOOM_resultset_record_immediate (r, i+start);
 588     }
 589 }
 590
 591 static zoom_ret do_connect (ZOOM_connection c)
 592 {
 593     void *add;
 594     const char *effective_host;
 595
 596     if (c->proxy)
 597         effective_host = c->proxy;
 598     else
 599         effective_host = c->host_port;
 600
 601     yaz_log (LOG_DEBUG, "do_connect host=%s", effective_host);
 602
 603     assert (!c->cs);
 604     c->cs = cs_create_host (effective_host, 0, &add);
 605
 606     if (c->cs)
 607     {
 608         int ret = cs_connect (c->cs, add);
 609         if (ret == 0)
 610         {
 611             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_CONNECT);
 612             ZOOM_connection_put_event(c, event);
 613             ZOOM_connection_send_init(c);
 614             c->state = STATE_ESTABLISHED;
 615             return zoom_pending;
 616         }
 617         else if (ret > 0)
 618         {
 619             c->state = STATE_CONNECTING;
 620             c->mask = ZOOM_SELECT_EXCEPT;
 621             if (c->cs->io_pending & CS_WANT_WRITE)
 622                 c->mask += ZOOM_SELECT_WRITE;
 623             if (c->cs->io_pending & CS_WANT_READ)
 624                 c->mask += ZOOM_SELECT_READ;
 625             return zoom_pending;
 626         }
 627     }
 628     c->state = STATE_IDLE;
 629     c->error = ZOOM_ERROR_CONNECT;
 630     return zoom_complete;
 631 }
 632
 633 int z3950_connection_socket(ZOOM_connection c)
 634 {
 635     if (c->cs)
 636         return cs_fileno(c->cs);
 637     return -1;
 638 }
 639
 640 int z3950_connection_mask(ZOOM_connection c)
 641 {
 642     if (c->cs)
 643         return c->mask;
 644     return 0;
 645 }
 646
 647 static void otherInfo_attach (ZOOM_connection c, Z_APDU *a, ODR out)
 648 {
 649     int i;
 650     for (i = 0; i<200; i++)
 651     {
 652         size_t len;
 653         Z_OtherInformation **oi;
 654         char buf[80];
 655         const char *val;
 656         const char *cp;
 657         int oidval;
 658
 659         sprintf (buf, "otherInfo%d", i);
 660         val = ZOOM_options_get (c->options, buf);
 661         if (!val)
 662             break;
 663         cp = strchr (val, ':');
 664         if (!cp)
 665             continue;
 666         len = cp - val;
 667         if (len >= sizeof(buf))
 668             len = sizeof(buf)-1;
 669         memcpy (buf, val, len);
 670         buf[len] = '\0';
 671         oidval = oid_getvalbyname (buf);
 672         if (oidval == VAL_NONE)
 673             continue;
 674
 675         yaz_oi_APDU(a, &oi);
 676         yaz_oi_set_string_oidval(oi, out, oidval, 1, cp+1);
 677     }
 678 }
 679
 680 static int encode_APDU(ZOOM_connection c, Z_APDU *a, ODR out)
 681 {
 682     assert (a);
 683     if (c->cookie_out)
 684     {
 685         Z_OtherInformation **oi;
 686         yaz_oi_APDU(a, &oi);
 687         yaz_oi_set_string_oidval(oi, out, VAL_COOKIE, 1, c->cookie_out);
 688     }
 689     if (c->client_IP)
 690     {
 691         Z_OtherInformation **oi;
 692         yaz_oi_APDU(a, &oi);
 693         yaz_oi_set_string_oidval(oi, out, VAL_CLIENT_IP, 1, c->client_IP);
 694     }
 695     otherInfo_attach (c, a, out);
 696     if (!z_APDU(out, &a, 0, 0))
 697     {
 698         FILE *outf = fopen("/tmp/apdu.txt", "a");
 699         if (a && outf)
 700         {
 701             ODR odr_pr = odr_createmem(ODR_PRINT);
 702             fprintf (outf, "a=%p\n", a);
 703             odr_setprint(odr_pr, outf);
 704             z_APDU(odr_pr, &a, 0, 0);
 705             odr_destroy(odr_pr);
 706         }
 707         yaz_log (LOG_DEBUG, "encoding failed");
 708         c->error = ZOOM_ERROR_ENCODE;
 709         odr_reset(out);
 710         return -1;
 711     }
 712
 713     return 0;
 714 }
 715
 716 static zoom_ret send_APDU (ZOOM_connection c, Z_APDU *a)
 717 {
 718     ZOOM_Event event;
 719     assert (a);
 720     if (encode_APDU(c, a, c->odr_out))
 721         return zoom_complete;
 722     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
 723     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
 724     ZOOM_connection_put_event (c, event);
 725     odr_reset(c->odr_out);
 726     return do_write (c);
 727 }
 728
 729 /* returns 1 if PDU was sent OK (still pending )
 730            0 if PDU was not sent OK (nothing to wait for)
 731 */
 732
 733 static zoom_ret ZOOM_connection_send_init (ZOOM_connection c)
 734 {
 735     const char *impname;
 736     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_initRequest);
 737     Z_InitRequest *ireq = apdu->u.initRequest;
 738     Z_IdAuthentication *auth = (Z_IdAuthentication *)
 739         odr_malloc(c->odr_out, sizeof(*auth));
 740     const char *auth_groupId = ZOOM_options_get (c->options, "group");
 741     const char *auth_userId = ZOOM_options_get (c->options, "user");
 742     const char *auth_password = ZOOM_options_get (c->options, "pass");
 743
 744     ODR_MASK_SET(ireq->options, Z_Options_search);
 745     ODR_MASK_SET(ireq->options, Z_Options_present);
 746     ODR_MASK_SET(ireq->options, Z_Options_scan);
 747     ODR_MASK_SET(ireq->options, Z_Options_sort);
 748     ODR_MASK_SET(ireq->options, Z_Options_extendedServices);
 749     ODR_MASK_SET(ireq->options, Z_Options_namedResultSets);
 750
 751     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_1);
 752     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_2);
 753     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_3);
 754
 755     impname = ZOOM_options_get (c->options, "implementationName");
 756     ireq->implementationName =
 757         (char *) odr_malloc (c->odr_out, 15 + (impname ? strlen(impname) : 0));
 758     strcpy (ireq->implementationName, "");
 759     if (impname)
 760     {
 761         strcat (ireq->implementationName, impname);
 762         strcat (ireq->implementationName, "/");
 763     }
 764     strcat (ireq->implementationName, "ZOOM-C/YAZ");
 765
 766     *ireq->maximumRecordSize =
 767         ZOOM_options_get_int (c->options, "maximumRecordSize", 1024*1024);
 768     *ireq->preferredMessageSize =
 769         ZOOM_options_get_int (c->options, "preferredMessageSize", 1024*1024);
 770
 771     if (auth_groupId || auth_password)
 772     {
 773         Z_IdPass *pass = (Z_IdPass *) odr_malloc(c->odr_out, sizeof(*pass));
 774         int i = 0;
 775         pass->groupId = 0;
 776         if (auth_groupId && *auth_groupId)
 777         {
 778             pass->groupId = (char *)
 779                 odr_malloc(c->odr_out, strlen(auth_groupId)+1);
 780             strcpy(pass->groupId, auth_groupId);
 781             i++;
 782         }
 783         pass->userId = 0;
 784         if (auth_userId && *auth_userId)
 785         {
 786             pass->userId = (char *)
 787                 odr_malloc(c->odr_out, strlen(auth_userId)+1);
 788             strcpy(pass->userId, auth_userId);
 789             i++;
 790         }
 791         pass->password = 0;
 792         if (auth_password && *auth_password)
 793         {
 794             pass->password = (char *)
 795                 odr_malloc(c->odr_out, strlen(auth_password)+1);
 796             strcpy(pass->password, auth_password);
 797             i++;
 798         }
 799         if (i)
 800         {
 801             auth->which = Z_IdAuthentication_idPass;
 802             auth->u.idPass = pass;
 803             ireq->idAuthentication = auth;
 804         }
 805     }
 806     else if (auth_userId)
 807     {
 808         auth->which = Z_IdAuthentication_open;
 809         auth->u.open = (char *)
 810             odr_malloc(c->odr_out, strlen(auth_userId)+1);
 811         strcpy(auth->u.open, auth_userId);
 812         ireq->idAuthentication = auth;
 813     }
 814     if (c->proxy)
 815         yaz_oi_set_string_oidval(&ireq->otherInfo, c->odr_out,
 816                                  VAL_PROXY, 1, c->host_port);
 817     if (c->charset||c->lang)
 818     {
 819         Z_OtherInformation **oi;
 820         Z_OtherInformationUnit *oi_unit;
 821
 822         yaz_oi_APDU(apdu, &oi);
 823
 824         if ((oi_unit = yaz_oi_update(oi, c->odr_out, NULL, 0, 0)))
 825         {
 826             ODR_MASK_SET(ireq->options, Z_Options_negotiationModel);
 827
 828             oi_unit->which = Z_OtherInfo_externallyDefinedInfo;
 829             oi_unit->information.externallyDefinedInfo =
 830                 yaz_set_proposal_charneg
 831                 (c->odr_out,
 832                  (const char **)&c->charset, (c->charset) ? 1:0,
 833                  (const char **)&c->lang, (c->lang) ? 1:0, 1);
 834         }
 835     }
 836     assert (apdu);
 837     return send_APDU (c, apdu);
 838 }
 839
 840 static zoom_ret ZOOM_connection_send_search (ZOOM_connection c)
 841 {
 842     ZOOM_resultset r;
 843     int lslb, ssub, mspn;
 844     const char *syntax;
 845     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_searchRequest);
 846     Z_SearchRequest *search_req = apdu->u.searchRequest;
 847     const char *elementSetName;
 848     const char *smallSetElementSetName;
 849     const char *mediumSetElementSetName;
 850     const char *schema;
 851
 852     assert (c->tasks);
 853     assert (c->tasks->which == ZOOM_TASK_SEARCH);
 854
 855     r = c->tasks->u.search.resultset;
 856
 857     elementSetName =
 858         ZOOM_options_get (r->options, "elementSetName");
 859     smallSetElementSetName  =
 860         ZOOM_options_get (r->options, "smallSetElementSetName");
 861     mediumSetElementSetName =
 862         ZOOM_options_get (r->options, "mediumSetElementSetName");
 863     schema =
 864         ZOOM_options_get (r->options, "schema");
 865
 866     if (!smallSetElementSetName)
 867         smallSetElementSetName = elementSetName;
 868
 869     if (!mediumSetElementSetName)
 870         mediumSetElementSetName = elementSetName;
 871
 872     assert (r);
 873     assert (r->r_query);
 874
 875     /* prepare query for the search request */
 876     search_req->query = r->r_query;
 877
 878     search_req->databaseNames =
 879         set_DatabaseNames (c, r->options, &search_req->num_databaseNames);
 880
 881     /* get syntax (no need to provide unless piggyback is in effect) */
 882     syntax = ZOOM_options_get (r->options, "preferredRecordSyntax");
 883
 884     lslb = ZOOM_options_get_int (r->options, "largeSetLowerBound", -1);
 885     ssub = ZOOM_options_get_int (r->options, "smallSetUpperBound", -1);
 886     mspn = ZOOM_options_get_int (r->options, "mediumSetPresentNumber", -1);
 887     if (lslb != -1 && ssub != -1 && mspn != -1)
 888     {
 889         /* So're a Z39.50 expert? Let's hope you don't do sort */
 890         *search_req->largeSetLowerBound = lslb;
 891         *search_req->smallSetUpperBound = ssub;
 892         *search_req->mediumSetPresentNumber = mspn;
 893     }
 894     else if (r->start == 0 && r->count > 0
 895              && r->piggyback && !r->r_sort_spec && !schema)
 896     {
 897         /* Regular piggyback - do it unless we're going to do sort */
 898         *search_req->largeSetLowerBound = 2000000000;
 899         *search_req->smallSetUpperBound = r->count;
 900         *search_req->mediumSetPresentNumber = r->count;
 901         smallSetElementSetName = 0;  /* no need to provide this */
 902     }
 903     else
 904     {
 905         /* non-piggyback. Need not provide elementsets or syntaxes .. */
 906         smallSetElementSetName = 0;
 907         mediumSetElementSetName = 0;
 908         syntax = 0;
 909     }
 910     if (smallSetElementSetName && *smallSetElementSetName)
 911     {
 912         Z_ElementSetNames *esn = (Z_ElementSetNames *)
 913             odr_malloc (c->odr_out, sizeof(*esn));
 914
 915         esn->which = Z_ElementSetNames_generic;
 916         esn->u.generic = odr_strdup (c->odr_out, smallSetElementSetName);
 917         search_req->smallSetElementSetNames = esn;
 918     }
 919     if (mediumSetElementSetName && *mediumSetElementSetName)
 920     {
 921         Z_ElementSetNames *esn = (Z_ElementSetNames *)
 922             odr_malloc (c->odr_out, sizeof(*esn));
 923
 924         esn->which = Z_ElementSetNames_generic;
 925         esn->u.generic = odr_strdup (c->odr_out, mediumSetElementSetName);
 926         search_req->mediumSetElementSetNames = esn;
 927     }
 928     if (syntax)
 929         search_req->preferredRecordSyntax =
 930             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
 931
 932     if (!r->setname)
 933     {
 934         if (c->support_named_resultsets)
 935         {
 936             char setname[14];
 937             int ord;
 938             /* find the lowest unused ordinal so that we re-use
 939                result sets on the server. */
 940             for (ord = 1; ; ord++)
 941             {
 942                 ZOOM_resultset rp;
 943                 sprintf (setname, "%d", ord);
 944                 for (rp = c->resultsets; rp; rp = rp->next)
 945                     if (rp->setname && !strcmp (rp->setname, setname))
 946                         break;
 947                 if (!rp)
 948                     break;
 949             }
 950             r->setname = xstrdup (setname);
 951             yaz_log (LOG_DEBUG, "allocating set %s", r->setname);
 952         }
 953         else
 954             r->setname = xstrdup ("default");
 955         ZOOM_options_set (r->options, "setname", r->setname);
 956     }
 957     search_req->resultSetName = odr_strdup(c->odr_out, r->setname);
 958     /* send search request */
 959     return send_APDU (c, apdu);
 960 }
 961
 962 static void response_diag (ZOOM_connection c, Z_DiagRec *p)
 963 {
 964     Z_DefaultDiagFormat *r;
 965     char *addinfo = 0;
 966
 967     xfree (c->addinfo);
 968     c->addinfo = 0;
 969     if (p->which != Z_DiagRec_defaultFormat)
 970     {
 971         c->error = ZOOM_ERROR_DECODE;
 972         return;
 973     }
 974     r = p->u.defaultFormat;
 975     switch (r->which)
 976     {
 977     case Z_DefaultDiagFormat_v2Addinfo:
 978         addinfo = r->u.v2Addinfo;
 979         break;
 980     case Z_DefaultDiagFormat_v3Addinfo:
 981         addinfo = r->u.v3Addinfo;
 982         break;
 983     }
 984     if (addinfo)
 985         c->addinfo = xstrdup (addinfo);
 986     c->error = *r->condition;
 987 }
 988
 989 ZOOM_API(ZOOM_record)
 990 ZOOM_record_clone (ZOOM_record srec)
 991 {
 992     char *buf;
 993     int size;
 994     ODR odr_enc;
 995     ZOOM_record nrec;
 996
 997     odr_enc = odr_createmem(ODR_ENCODE);
 998     if (!z_NamePlusRecord (odr_enc, &srec->npr, 0, 0))
 999         return 0;
1000     buf = odr_getbuf (odr_enc, &size, 0);
1001
1002     nrec = (ZOOM_record) xmalloc (sizeof(*nrec));
1003     nrec->odr = odr_createmem(ODR_DECODE);
1004     nrec->wrbuf_marc = 0;
1005     odr_setbuf (nrec->odr, buf, size, 0);
1006     z_NamePlusRecord (nrec->odr, &nrec->npr, 0, 0);
1007
1008     odr_destroy (odr_enc);
1009     return nrec;
1010 }
1011
1012 ZOOM_API(ZOOM_record)
1013 ZOOM_resultset_record_immediate (ZOOM_resultset s,size_t pos)
1014 {
1015     return record_cache_lookup (s, pos);
1016 }
1017
1018 ZOOM_API(ZOOM_record)
1019 ZOOM_resultset_record (ZOOM_resultset r, size_t pos)
1020 {
1021     ZOOM_resultset_retrieve (r, 1, pos, 1);
1022     return ZOOM_resultset_record_immediate (r, pos);
1023 }
1024
1025 ZOOM_API(void)
1026 ZOOM_record_destroy (ZOOM_record rec)
1027 {
1028     if (!rec)
1029         return;
1030     if (rec->wrbuf_marc)
1031         wrbuf_free (rec->wrbuf_marc, 1);
1032     odr_destroy (rec->odr);
1033     xfree (rec);
1034 }
1035
1036 ZOOM_API(const char *)
1037 ZOOM_record_get (ZOOM_record rec, const char *type, int *len)
1038 {
1039     Z_NamePlusRecord *npr;
1040
1041     if (len)
1042         *len = 0; /* default return */
1043
1044     if (!rec)
1045         return 0;
1046     npr = rec->npr;
1047     if (!npr)
1048         return 0;
1049     if (!strcmp (type, "database"))
1050     {
1051         if (len)
1052             *len = (npr->databaseName ? strlen(npr->databaseName) : 0);
1053         return npr->databaseName;
1054     }
1055     else if (!strcmp (type, "syntax"))
1056     {
1057         const char *desc = 0;
1058         if (npr->which == Z_NamePlusRecord_databaseRecord)
1059         {
1060             Z_External *r = (Z_External *) npr->u.databaseRecord;
1061             oident *ent = oid_getentbyoid(r->direct_reference);
1062             if (ent)
1063                 desc = ent->desc;
1064         }
1065         if (!desc)
1066             desc = "none";
1067         if (len)
1068             *len = strlen(desc);
1069         return desc;
1070     }
1071     else if (!strcmp (type, "render") &&
1072              npr->which == Z_NamePlusRecord_databaseRecord)
1073     {
1074         Z_External *r = (Z_External *) npr->u.databaseRecord;
1075         oident *ent = oid_getentbyoid(r->direct_reference);
1076
1077         if (r->which == Z_External_sutrs)
1078         {
1079             if (len) *len = r->u.sutrs->len;
1080             return (const char *) r->u.sutrs->buf;
1081         }
1082         else if (r->which == Z_External_octet)
1083         {
1084             switch (ent->value)
1085             {
1086             case VAL_SOIF:
1087             case VAL_HTML:
1088             case VAL_SUTRS:
1089                 break;
1090             case VAL_TEXT_XML:
1091             case VAL_APPLICATION_XML:
1092                 break;
1093             default:
1094                 if (!rec->wrbuf_marc)
1095                     rec->wrbuf_marc = wrbuf_alloc();
1096                 wrbuf_rewind (rec->wrbuf_marc);
1097                 if (yaz_marc_decode ((const char *)
1098                                      r->u.octet_aligned->buf,
1099                                      rec->wrbuf_marc, 0,
1100                                      r->u.octet_aligned->len,
1101                                      0) > 0)
1102                 {
1103                     if (len) *len = wrbuf_len(rec->wrbuf_marc);
1104                     return wrbuf_buf(rec->wrbuf_marc);
1105                 }
1106             }
1107             if (len) *len = r->u.octet_aligned->len;
1108             return (const char *) r->u.octet_aligned->buf;
1109         }
1110         else if (r->which == Z_External_grs1)
1111         {
1112             if (!rec->wrbuf_marc)
1113                 rec->wrbuf_marc = wrbuf_alloc();
1114             wrbuf_rewind (rec->wrbuf_marc);
1115             yaz_display_grs1(rec->wrbuf_marc, r->u.grs1, 0);
1116             if (len)
1117                 *len = wrbuf_len(rec->wrbuf_marc);
1118             return wrbuf_buf(rec->wrbuf_marc);
1119         }
1120         return 0;
1121     }
1122     else if (!strcmp (type, "xml") &&
1123              npr->which == Z_NamePlusRecord_databaseRecord)
1124     {
1125         Z_External *r = (Z_External *) npr->u.databaseRecord;
1126         oident *ent = oid_getentbyoid(r->direct_reference);
1127
1128         if (r->which == Z_External_sutrs)
1129         {
1130             if (len) *len = r->u.sutrs->len;
1131             return (const char *) r->u.sutrs->buf;
1132         }
1133         else if (r->which == Z_External_octet)
1134         {
1135             switch (ent->value)
1136             {
1137             case VAL_SOIF:
1138             case VAL_HTML:
1139             case VAL_SUTRS:
1140                 break;
1141             case VAL_TEXT_XML:
1142             case VAL_APPLICATION_XML:
1143                 break;
1144             default:
1145                 if (!rec->wrbuf_marc)
1146                     rec->wrbuf_marc = wrbuf_alloc();
1147                 wrbuf_rewind (rec->wrbuf_marc);
1148                 if (yaz_marc_decode ((const char *)
1149                                      r->u.octet_aligned->buf,
1150                                      rec->wrbuf_marc, 0,
1151                                      r->u.octet_aligned->len,
1152                                      2) > 0)
1153                 {
1154                     if (len) *len = wrbuf_len(rec->wrbuf_marc);
1155                     return wrbuf_buf(rec->wrbuf_marc);
1156                 }
1157             }
1158             if (len) *len = r->u.octet_aligned->len;
1159             return (const char *) r->u.octet_aligned->buf;
1160         }
1161         else if (r->which == Z_External_grs1)
1162         {
1163             if (len) *len = 5;
1164             return "GRS-1";
1165         }
1166         return 0;
1167     }
1168     else if (!strcmp (type, "raw"))
1169     {
1170         if (npr->which == Z_NamePlusRecord_databaseRecord)
1171         {
1172             Z_External *r = (Z_External *) npr->u.databaseRecord;
1173
1174             if (r->which == Z_External_sutrs)
1175             {
1176                 if (len) *len = r->u.sutrs->len;
1177                 return (const char *) r->u.sutrs->buf;
1178             }
1179             else if (r->which == Z_External_octet)
1180             {
1181                 if (len) *len = r->u.octet_aligned->len;
1182                 return (const char *) r->u.octet_aligned->buf;
1183             }
1184             else /* grs-1, explain, ... */
1185             {
1186                 if (len) *len = -1;
1187                 return (const char *) npr->u.databaseRecord;
1188             }
1189         }
1190         return 0;
1191     }
1192     else if (!strcmp (type, "ext"))
1193     {
1194         if (npr->which == Z_NamePlusRecord_databaseRecord)
1195             return (const char *) npr->u.databaseRecord;
1196         return 0;
1197     }
1198     return 0;
1199 }
1200
1201 static void record_cache_add (ZOOM_resultset r, Z_NamePlusRecord *npr, int pos)
1202 {
1203     ZOOM_record_cache rc;
1204     const char *elementSetName =
1205         ZOOM_resultset_option_get (r, "elementSetName");
1206     const char *syntax =
1207         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1208
1209
1210     for (rc = r->record_cache; rc; rc = rc->next)
1211     {
1212         if (pos == rc->pos)
1213         {
1214             if ((!elementSetName && !rc->elementSetName)
1215                 || (elementSetName && rc->elementSetName &&
1216                     !strcmp (elementSetName, rc->elementSetName)))
1217             {
1218                 if ((!syntax && !rc->syntax)
1219                     || (syntax && rc->syntax &&
1220                         !strcmp (syntax, rc->syntax)))
1221                 {
1222                     /* not destroying rc->npr (it's handled by nmem )*/
1223                     rc->rec.npr = npr;
1224                     /* keeping wrbuf_marc too */
1225                     return;
1226                 }
1227             }
1228         }
1229     }
1230     rc = (ZOOM_record_cache) odr_malloc (r->odr, sizeof(*rc));
1231     rc->rec.npr = npr;
1232     rc->rec.odr = 0;
1233     rc->rec.wrbuf_marc = 0;
1234     if (elementSetName)
1235         rc->elementSetName = odr_strdup (r->odr, elementSetName);
1236     else
1237         rc->elementSetName = 0;
1238
1239     if (syntax)
1240         rc->syntax = odr_strdup (r->odr, syntax);
1241     else
1242         rc->syntax = 0;
1243
1244     rc->pos = pos;
1245     rc->next = r->record_cache;
1246     r->record_cache = rc;
1247 }
1248
1249 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos)
1250 {
1251     ZOOM_record_cache rc;
1252     const char *elementSetName =
1253         ZOOM_resultset_option_get (r, "elementSetName");
1254     const char *syntax =
1255         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1256
1257     for (rc = r->record_cache; rc; rc = rc->next)
1258     {
1259         if (pos == rc->pos)
1260         {
1261             if ((!elementSetName && !rc->elementSetName)
1262                 || (elementSetName && rc->elementSetName &&
1263                     !strcmp (elementSetName, rc->elementSetName)))
1264             {
1265                 if ((!syntax && !rc->syntax)
1266                     || (syntax && rc->syntax &&
1267                         !strcmp (syntax, rc->syntax)))
1268                     return &rc->rec;
1269             }
1270         }
1271     }
1272     return 0;
1273 }
1274
1275 static void handle_records (ZOOM_connection c, Z_Records *sr,
1276                             int present_phase)
1277 {
1278     ZOOM_resultset resultset;
1279
1280     if (!c->tasks)
1281         return ;
1282     switch (c->tasks->which)
1283     {
1284     case ZOOM_TASK_SEARCH:
1285         resultset = c->tasks->u.search.resultset;
1286         break;
1287     case ZOOM_TASK_RETRIEVE:
1288         resultset = c->tasks->u.retrieve.resultset;
1289         break;
1290     default:
1291         return;
1292     }
1293     if (sr && sr->which == Z_Records_NSD)
1294     {
1295         Z_DiagRec dr, *dr_p = &dr;
1296         dr.which = Z_DiagRec_defaultFormat;
1297         dr.u.defaultFormat = sr->u.nonSurrogateDiagnostic;
1298
1299         response_diag (c, dr_p);
1300     }
1301     else if (sr && sr->which == Z_Records_multipleNSD)
1302     {
1303         if (sr->u.multipleNonSurDiagnostics->num_diagRecs >= 1)
1304             response_diag(c, sr->u.multipleNonSurDiagnostics->diagRecs[0]);
1305         else
1306             c->error = ZOOM_ERROR_DECODE;
1307     }
1308     else
1309     {
1310         if (resultset->count + resultset->start > resultset->size)
1311             resultset->count = resultset->size - resultset->start;
1312         if (resultset->count < 0)
1313             resultset->count = 0;
1314         if (sr && sr->which == Z_Records_DBOSD)
1315         {
1316             int i;
1317             NMEM nmem = odr_extract_mem (c->odr_in);
1318             Z_NamePlusRecordList *p =
1319                 sr->u.databaseOrSurDiagnostics;
1320             for (i = 0; i<p->num_records; i++)
1321             {
1322                 record_cache_add (resultset, p->records[i],
1323                                   i+ resultset->start);
1324             }
1325             /* transfer our response to search_nmem .. we need it later */
1326             nmem_transfer (resultset->odr->mem, nmem);
1327             nmem_destroy (nmem);
1328             if (present_phase && p->num_records == 0)
1329             {
1330                 /* present response and we didn't get any records! */
1331                 c->error = ZOOM_ERROR_DECODE;
1332             }
1333         }
1334         else if (present_phase)
1335         {
1336             /* present response and we didn't get any records! */
1337             c->error = ZOOM_ERROR_DECODE;
1338         }
1339     }
1340 }
1341
1342 static void handle_present_response (ZOOM_connection c, Z_PresentResponse *pr)
1343 {
1344     handle_records (c, pr->records, 1);
1345 }
1346
1347 static void handle_search_response (ZOOM_connection c, Z_SearchResponse *sr)
1348 {
1349     ZOOM_resultset resultset;
1350
1351     yaz_log (LOG_DEBUG, "got search response");
1352
1353     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1354         return ;
1355
1356     resultset = c->tasks->u.search.resultset;
1357
1358     resultset->size = *sr->resultCount;
1359     handle_records (c, sr->records, 0);
1360 }
1361
1362 static void sort_response (ZOOM_connection c, Z_SortResponse *res)
1363 {
1364     if (res->diagnostics && res->num_diagnostics > 0)
1365         response_diag (c, res->diagnostics[0]);
1366 }
1367
1368 static int scan_response (ZOOM_connection c, Z_ScanResponse *res)
1369 {
1370     NMEM nmem = odr_extract_mem (c->odr_in);
1371     ZOOM_scanset scan;
1372
1373     if (!c->tasks || c->tasks->which != ZOOM_TASK_SCAN)
1374         return 0;
1375     scan = c->tasks->u.scan.scan;
1376
1377     if (res->entries && res->entries->nonsurrogateDiagnostics)
1378         response_diag(c, res->entries->nonsurrogateDiagnostics[0]);
1379     scan->scan_response = res;
1380     nmem_transfer (scan->odr->mem, nmem);
1381     if (res->stepSize)
1382         ZOOM_options_set_int (scan->options, "stepSize", *res->stepSize);
1383     if (res->positionOfTerm)
1384         ZOOM_options_set_int (scan->options, "position", *res->positionOfTerm);
1385     if (res->scanStatus)
1386         ZOOM_options_set_int (scan->options, "scanStatus", *res->scanStatus);
1387     if (res->numberOfEntriesReturned)
1388         ZOOM_options_set_int (scan->options, "number",
1389                               *res->numberOfEntriesReturned);
1390     nmem_destroy (nmem);
1391     return 1;
1392 }
1393
1394 static zoom_ret send_sort (ZOOM_connection c)
1395 {
1396     ZOOM_resultset  resultset;
1397
1398     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1399         return zoom_complete;
1400
1401     resultset = c->tasks->u.search.resultset;
1402
1403     if (c->error)
1404     {
1405         resultset->r_sort_spec = 0;
1406         return zoom_complete;
1407     }
1408     if (resultset->r_sort_spec)
1409     {
1410         Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_sortRequest);
1411         Z_SortRequest *req = apdu->u.sortRequest;
1412
1413         req->num_inputResultSetNames = 1;
1414         req->inputResultSetNames = (Z_InternationalString **)
1415             odr_malloc (c->odr_out, sizeof(*req->inputResultSetNames));
1416         req->inputResultSetNames[0] =
1417             odr_strdup (c->odr_out, resultset->setname);
1418         req->sortedResultSetName = odr_strdup (c->odr_out, resultset->setname);
1419         req->sortSequence = resultset->r_sort_spec;
1420         resultset->r_sort_spec = 0;
1421         return send_APDU (c, apdu);
1422     }
1423     return zoom_complete;
1424 }
1425
1426 static zoom_ret send_present (ZOOM_connection c)
1427 {
1428     Z_APDU *apdu = 0;
1429     Z_PresentRequest *req = 0;
1430     int i = 0;
1431     const char *syntax = 0;
1432     const char *elementSetName = 0;
1433     const char *schema = 0;
1434     ZOOM_resultset  resultset;
1435
1436     if (!c->tasks)
1437         return zoom_complete;
1438
1439     switch (c->tasks->which)
1440     {
1441     case ZOOM_TASK_SEARCH:
1442         resultset = c->tasks->u.search.resultset;
1443         break;
1444     case ZOOM_TASK_RETRIEVE:
1445         resultset = c->tasks->u.retrieve.resultset;
1446         resultset->start = c->tasks->u.retrieve.start;
1447         resultset->count = c->tasks->u.retrieve.count;
1448
1449         if (resultset->start >= resultset->size)
1450             return zoom_complete;
1451         if (resultset->start + resultset->count > resultset->size)
1452             resultset->count = resultset->size - resultset->start;
1453         break;
1454     default:
1455         return zoom_complete;
1456     }
1457
1458     syntax = ZOOM_resultset_option_get (resultset, "preferredRecordSyntax");
1459     elementSetName = ZOOM_resultset_option_get (resultset, "elementSetName");
1460     schema = ZOOM_resultset_option_get (resultset, "schema");
1461
1462     if (c->error)                  /* don't continue on error */
1463         return zoom_complete;
1464     if (resultset->start < 0)
1465         return zoom_complete;
1466     for (i = 0; i<resultset->count; i++)
1467     {
1468         ZOOM_record rec =
1469             record_cache_lookup (resultset, i + resultset->start);
1470         if (!rec)
1471             break;
1472     }
1473     if (i == resultset->count)
1474         return zoom_complete;
1475
1476     apdu = zget_APDU(c->odr_out, Z_APDU_presentRequest);
1477     req = apdu->u.presentRequest;
1478
1479     resultset->start += i;
1480     resultset->count -= i;
1481     *req->resultSetStartPoint = resultset->start + 1;
1482     *req->numberOfRecordsRequested = resultset->count;
1483     assert (*req->numberOfRecordsRequested > 0);
1484
1485     if (syntax && *syntax)
1486         req->preferredRecordSyntax =
1487             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1488
1489     if (schema && *schema)
1490     {
1491         Z_RecordComposition *compo = (Z_RecordComposition *)
1492             odr_malloc (c->odr_out, sizeof(*compo));
1493
1494         req->recordComposition = compo;
1495         compo->which = Z_RecordComp_complex;
1496         compo->u.complex = (Z_CompSpec *)
1497             odr_malloc(c->odr_out, sizeof(*compo->u.complex));
1498         compo->u.complex->selectAlternativeSyntax = (bool_t *)
1499             odr_malloc(c->odr_out, sizeof(bool_t));
1500         *compo->u.complex->selectAlternativeSyntax = 0;
1501
1502         compo->u.complex->generic = (Z_Specification *)
1503             odr_malloc(c->odr_out, sizeof(*compo->u.complex->generic));
1504
1505         compo->u.complex->generic->schema = (Odr_oid *)
1506             yaz_str_to_z3950oid (c->odr_out, CLASS_SCHEMA, schema);
1507
1508         if (!compo->u.complex->generic->schema)
1509         {
1510             /* OID wasn't a schema! Try record syntax instead. */
1511
1512             compo->u.complex->generic->schema = (Odr_oid *)
1513                 yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, schema);
1514         }
1515         if (elementSetName && *elementSetName)
1516         {
1517             compo->u.complex->generic->elementSpec = (Z_ElementSpec *)
1518                 odr_malloc(c->odr_out, sizeof(Z_ElementSpec));
1519             compo->u.complex->generic->elementSpec->which =
1520                 Z_ElementSpec_elementSetName;
1521             compo->u.complex->generic->elementSpec->u.elementSetName =
1522                 odr_strdup (c->odr_out, elementSetName);
1523         }
1524         else
1525             compo->u.complex->generic->elementSpec = 0;
1526         compo->u.complex->num_dbSpecific = 0;
1527         compo->u.complex->dbSpecific = 0;
1528         compo->u.complex->num_recordSyntax = 0;
1529         compo->u.complex->recordSyntax = 0;
1530     }
1531     else if (elementSetName && *elementSetName)
1532     {
1533         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1534             odr_malloc (c->odr_out, sizeof(*esn));
1535         Z_RecordComposition *compo = (Z_RecordComposition *)
1536             odr_malloc (c->odr_out, sizeof(*compo));
1537
1538         esn->which = Z_ElementSetNames_generic;
1539         esn->u.generic = odr_strdup (c->odr_out, elementSetName);
1540         compo->which = Z_RecordComp_simple;
1541         compo->u.simple = esn;
1542         req->recordComposition = compo;
1543     }
1544     req->resultSetId = odr_strdup(c->odr_out, resultset->setname);
1545     return send_APDU (c, apdu);
1546 }
1547
1548 ZOOM_API(ZOOM_scanset)
1549 ZOOM_connection_scan (ZOOM_connection c, const char *start)
1550 {
1551     ZOOM_scanset scan = (ZOOM_scanset) xmalloc (sizeof(*scan));
1552
1553     scan->connection = c;
1554     scan->odr = odr_createmem (ODR_DECODE);
1555     scan->options = ZOOM_options_create_with_parent (c->options);
1556     scan->refcount = 1;
1557     scan->scan_response = 0;
1558
1559     if ((scan->termListAndStartPoint =
1560          p_query_scan(scan->odr, PROTO_Z3950, &scan->attributeSet,
1561                       start)))
1562     {
1563         ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_SCAN);
1564         task->u.scan.scan = scan;
1565
1566         (scan->refcount)++;
1567         if (!c->async)
1568         {
1569             while (ZOOM_event (1, &c))
1570                 ;
1571         }
1572     }
1573     return scan;
1574 }
1575
1576 ZOOM_API(void)
1577 ZOOM_scanset_destroy (ZOOM_scanset scan)
1578 {
1579     if (!scan)
1580         return;
1581     (scan->refcount)--;
1582     if (scan->refcount == 0)
1583     {
1584         odr_destroy (scan->odr);
1585
1586         ZOOM_options_destroy (scan->options);
1587         xfree (scan);
1588     }
1589 }
1590
1591 static zoom_ret send_package (ZOOM_connection c)
1592 {
1593     ZOOM_Event event;
1594     if (!c->tasks)
1595         return zoom_complete;
1596     assert (c->tasks->which == ZOOM_TASK_PACKAGE);
1597
1598     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
1599     ZOOM_connection_put_event (c, event);
1600
1601     return do_write_ex (c, c->tasks->u.package->buf_out,
1602                         c->tasks->u.package->len_out);
1603 }
1604
1605 static zoom_ret send_scan (ZOOM_connection c)
1606 {
1607     ZOOM_scanset scan;
1608     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_scanRequest);
1609     Z_ScanRequest *req = apdu->u.scanRequest;
1610     if (!c->tasks)
1611         return zoom_complete;
1612     assert (c->tasks->which == ZOOM_TASK_SCAN);
1613     scan = c->tasks->u.scan.scan;
1614
1615     req->termListAndStartPoint = scan->termListAndStartPoint;
1616     req->attributeSet = scan->attributeSet;
1617
1618     *req->numberOfTermsRequested =
1619         ZOOM_options_get_int(scan->options, "number", 10);
1620
1621     req->preferredPositionInResponse =
1622         odr_intdup (c->odr_out,
1623                     ZOOM_options_get_int(scan->options, "position", 1));
1624
1625     req->stepSize =
1626         odr_intdup (c->odr_out,
1627                     ZOOM_options_get_int(scan->options, "stepSize", 0));
1628
1629     req->databaseNames = set_DatabaseNames (c, scan->options,
1630                                             &req->num_databaseNames);
1631
1632     return send_APDU (c, apdu);
1633 }
1634
1635 ZOOM_API(size_t)
1636 ZOOM_scanset_size (ZOOM_scanset scan)
1637 {
1638     if (!scan || !scan->scan_response || !scan->scan_response->entries)
1639         return 0;
1640     return scan->scan_response->entries->num_entries;
1641 }
1642
1643 ZOOM_API(const char *)
1644 ZOOM_scanset_term (ZOOM_scanset scan, size_t pos,
1645                                int *occ, int *len)
1646 {
1647     const char *term = 0;
1648     size_t noent = ZOOM_scanset_size (scan);
1649     Z_ScanResponse *res = scan->scan_response;
1650
1651     *len = 0;
1652     *occ = 0;
1653     if (pos >= noent)
1654         return 0;
1655     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
1656     {
1657         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
1658
1659         if (t->term->which == Z_Term_general)
1660         {
1661             term = (const char *) t->term->u.general->buf;
1662             *len = t->term->u.general->len;
1663         }
1664         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
1665     }
1666     return term;
1667 }
1668
1669 ZOOM_API(const char *)
1670 ZOOM_scanset_option_get (ZOOM_scanset scan, const char *key)
1671 {
1672     return ZOOM_options_get (scan->options, key);
1673 }
1674
1675 ZOOM_API(void)
1676 ZOOM_scanset_option_set (ZOOM_scanset scan, const char *key,
1677                               const char *val)
1678 {
1679     ZOOM_options_set (scan->options, key, val);
1680 }
1681
1682 static Z_APDU *create_es_package (ZOOM_package p, int type)
1683 {
1684     const char *str;
1685     Z_APDU *apdu = zget_APDU(p->odr_out, Z_APDU_extendedServicesRequest);
1686     Z_ExtendedServicesRequest *req = apdu->u.extendedServicesRequest;
1687
1688     *req->function = Z_ExtendedServicesRequest_create;
1689
1690     str = ZOOM_options_get(p->options, "package-name");
1691     if (str && *str)
1692         req->packageName = nmem_strdup (p->odr_out->mem, str);
1693
1694     str = ZOOM_options_get(p->options, "user-id");
1695     if (str)
1696         req->userId = nmem_strdup (p->odr_out->mem, str);
1697
1698     req->packageType = yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
1699                                               type);
1700
1701     str = ZOOM_options_get(p->options, "function");
1702     if (str)
1703     {
1704         if (!strcmp (str, "create"))
1705             *req->function = 1;
1706         if (!strcmp (str, "delete"))
1707             *req->function = 2;
1708         if (!strcmp (str, "modify"))
1709             *req->function = 3;
1710     }
1711     return apdu;
1712 }
1713
1714 static const char *ill_array_lookup (void *clientData, const char *idx)
1715 {
1716     ZOOM_package p = (ZOOM_package) clientData;
1717     return ZOOM_options_get (p->options, idx+4);
1718 }
1719
1720 static Z_External *encode_ill_request (ZOOM_package p)
1721 {
1722     ODR out = p->odr_out;
1723     ILL_Request *req;
1724     Z_External *r = 0;
1725     struct ill_get_ctl ctl;
1726
1727     ctl.odr = p->odr_out;
1728     ctl.clientData = p;
1729     ctl.f = ill_array_lookup;
1730
1731     req = ill_get_ILLRequest(&ctl, "ill", 0);
1732
1733     if (!ill_Request (out, &req, 0, 0))
1734     {
1735         int ill_request_size;
1736         char *ill_request_buf = odr_getbuf (out, &ill_request_size, 0);
1737         if (ill_request_buf)
1738             odr_setbuf (out, ill_request_buf, ill_request_size, 1);
1739         return 0;
1740     }
1741     else
1742     {
1743         oident oid;
1744         int illRequest_size = 0;
1745         char *illRequest_buf = odr_getbuf (out, &illRequest_size, 0);
1746
1747         oid.proto = PROTO_GENERAL;
1748         oid.oclass = CLASS_GENERAL;
1749         oid.value = VAL_ISO_ILL_1;
1750
1751         r = (Z_External *) odr_malloc (out, sizeof(*r));
1752         r->direct_reference = odr_oiddup(out,oid_getoidbyent(&oid));
1753         r->indirect_reference = 0;
1754         r->descriptor = 0;
1755         r->which = Z_External_single;
1756
1757         r->u.single_ASN1_type = (Odr_oct *)
1758             odr_malloc (out, sizeof(*r->u.single_ASN1_type));
1759         r->u.single_ASN1_type->buf = (unsigned char*)
1760             odr_malloc (out, illRequest_size);
1761         r->u.single_ASN1_type->len = illRequest_size;
1762         r->u.single_ASN1_type->size = illRequest_size;
1763         memcpy (r->u.single_ASN1_type->buf, illRequest_buf, illRequest_size);
1764     }
1765     return r;
1766 }
1767
1768 static Z_ItemOrder *encode_item_order(ZOOM_package p)
1769 {
1770     Z_ItemOrder *req = (Z_ItemOrder *) odr_malloc (p->odr_out, sizeof(*req));
1771     const char *str;
1772
1773     req->which=Z_IOItemOrder_esRequest;
1774     req->u.esRequest = (Z_IORequest *)
1775         odr_malloc(p->odr_out,sizeof(Z_IORequest));
1776
1777     /* to keep part ... */
1778     req->u.esRequest->toKeep = (Z_IOOriginPartToKeep *)
1779         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartToKeep));
1780     req->u.esRequest->toKeep->supplDescription = 0;
1781     req->u.esRequest->toKeep->contact = (Z_IOContact *)
1782         odr_malloc (p->odr_out, sizeof(*req->u.esRequest->toKeep->contact));
1783
1784     str = ZOOM_options_get(p->options, "contact-name");
1785     req->u.esRequest->toKeep->contact->name = str ?
1786         nmem_strdup (p->odr_out->mem, str) : 0;
1787
1788     str = ZOOM_options_get(p->options, "contact-phone");
1789     req->u.esRequest->toKeep->contact->phone = str ?
1790         nmem_strdup (p->odr_out->mem, str) : 0;
1791
1792     str = ZOOM_options_get(p->options, "contact-email");
1793     req->u.esRequest->toKeep->contact->email = str ?
1794         nmem_strdup (p->odr_out->mem, str) : 0;
1795
1796     req->u.esRequest->toKeep->addlBilling = 0;
1797
1798     /* not to keep part ... */
1799     req->u.esRequest->notToKeep = (Z_IOOriginPartNotToKeep *)
1800         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartNotToKeep));
1801
1802     req->u.esRequest->notToKeep->resultSetItem = (Z_IOResultSetItem *)
1803         odr_malloc(p->odr_out, sizeof(Z_IOResultSetItem));
1804
1805     str = ZOOM_options_get(p->options, "itemorder-setname");
1806     if (!str)
1807         str = "default";
1808     req->u.esRequest->notToKeep->resultSetItem->resultSetId =
1809         nmem_strdup (p->odr_out->mem, str);
1810     req->u.esRequest->notToKeep->resultSetItem->item =
1811         (int *) odr_malloc(p->odr_out, sizeof(int));
1812
1813     str = ZOOM_options_get(p->options, "itemorder-item");
1814     *req->u.esRequest->notToKeep->resultSetItem->item =
1815         (str ? atoi(str) : 1);
1816
1817     req->u.esRequest->notToKeep->itemRequest = encode_ill_request(p);
1818
1819     return req;
1820 }
1821
1822 ZOOM_API(void)
1823     ZOOM_package_send (ZOOM_package p, const char *type)
1824 {
1825     Z_APDU *apdu = 0;
1826     ZOOM_connection c;
1827     if (!p)
1828         return;
1829     c = p->connection;
1830     odr_reset (p->odr_out);
1831     xfree (p->buf_out);
1832     p->buf_out = 0;
1833     if (!strcmp(type, "itemorder"))
1834     {
1835         Z_External *r;
1836         apdu = create_es_package (p, VAL_ITEMORDER);
1837         if (apdu)
1838         {
1839             r = (Z_External *) odr_malloc (p->odr_out, sizeof(*r));
1840
1841             r->direct_reference =
1842                 yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
1843                                        VAL_ITEMORDER);
1844             r->descriptor = 0;
1845             r->which = Z_External_itemOrder;
1846             r->indirect_reference = 0;
1847             r->u.itemOrder = encode_item_order (p);
1848
1849             apdu->u.extendedServicesRequest->taskSpecificParameters = r;
1850         }
1851     }
1852     if (apdu)
1853     {
1854         if (encode_APDU(p->connection, apdu, p->odr_out) == 0)
1855         {
1856             char *buf;
1857
1858             ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_PACKAGE);
1859             task->u.package = p;
1860             buf = odr_getbuf(p->odr_out, &p->len_out, 0);
1861             p->buf_out = (char *) xmalloc (p->len_out);
1862             memcpy (p->buf_out, buf, p->len_out);
1863
1864             (p->refcount)++;
1865             if (!c->async)
1866             {
1867                 while (ZOOM_event (1, &c))
1868                     ;
1869             }
1870         }
1871     }
1872 }
1873
1874 ZOOM_API(ZOOM_package)
1875     ZOOM_connection_package (ZOOM_connection c, ZOOM_options options)
1876 {
1877     ZOOM_package p = (ZOOM_package) xmalloc (sizeof(*p));
1878
1879     p->connection = c;
1880     p->odr_out = odr_createmem (ODR_ENCODE);
1881     p->options = ZOOM_options_create_with_parent2 (options, c->options);
1882     p->refcount = 1;
1883     p->buf_out = 0;
1884     p->len_out = 0;
1885     return p;
1886 }
1887
1888 ZOOM_API(void)
1889     ZOOM_package_destroy(ZOOM_package p)
1890 {
1891     if (!p)
1892         return;
1893     (p->refcount)--;
1894     if (p->refcount == 0)
1895     {
1896         odr_destroy (p->odr_out);
1897         xfree (p->buf_out);
1898
1899         ZOOM_options_destroy (p->options);
1900         xfree (p);
1901     }
1902 }
1903
1904 ZOOM_API(const char *)
1905 ZOOM_package_option_get (ZOOM_package p, const char *key)
1906 {
1907     return ZOOM_options_get (p->options, key);
1908 }
1909
1910 ZOOM_API(void)
1911 ZOOM_package_option_set (ZOOM_package p, const char *key,
1912                               const char *val)
1913 {
1914     ZOOM_options_set (p->options, key, val);
1915 }
1916
1917 static int ZOOM_connection_exec_task (ZOOM_connection c)
1918 {
1919     ZOOM_task task = c->tasks;
1920     zoom_ret ret = zoom_complete;
1921
1922     if (!task)
1923     {
1924         yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task task=<null>");
1925         return 0;
1926     }
1927     yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task type=%d run=%d",
1928              task->which, task->running);
1929     if (c->error != ZOOM_ERROR_NONE ||
1930         (!c->cs && task->which != ZOOM_TASK_CONNECT))
1931     {
1932         yaz_log (LOG_DEBUG, "remove tasks because of error = %d", c->error);
1933         ZOOM_connection_remove_tasks (c);
1934         return 0;
1935     }
1936     if (task->running)
1937     {
1938         yaz_log (LOG_DEBUG, "task already running");
1939         return 0;
1940     }
1941     task->running = 1;
1942     switch (task->which)
1943     {
1944     case ZOOM_TASK_SEARCH:
1945         ret = ZOOM_connection_send_search (c);
1946         break;
1947     case ZOOM_TASK_RETRIEVE:
1948         ret = send_present (c);
1949         break;
1950     case ZOOM_TASK_CONNECT:
1951         ret = do_connect(c);
1952         break;
1953     case ZOOM_TASK_SCAN:
1954         ret = send_scan(c);
1955         break;
1956     case ZOOM_TASK_PACKAGE:
1957         ret = send_package(c);
1958         break;
1959     }
1960     if (ret == zoom_complete)
1961     {
1962         yaz_log (LOG_DEBUG, "task removed (complete)");
1963         ZOOM_connection_remove_task (c);
1964         return 0;
1965     }
1966     yaz_log (LOG_DEBUG, "task pending");
1967     return 1;
1968 }
1969
1970 static zoom_ret send_sort_present (ZOOM_connection c)
1971 {
1972     zoom_ret r = send_sort (c);
1973     if (r == zoom_complete)
1974         r = send_present (c);
1975     return r;
1976 }
1977
1978 static int es_response (ZOOM_connection c,
1979                         Z_ExtendedServicesResponse *res)
1980 {
1981     if (!c->tasks || c->tasks->which != ZOOM_TASK_PACKAGE)
1982         return 0;
1983     if (res->diagnostics && res->num_diagnostics > 0)
1984         response_diag(c, res->diagnostics[0]);
1985     if (res->taskPackage &&
1986         res->taskPackage->which == Z_External_extendedService)
1987     {
1988         Z_TaskPackage *taskPackage = res->taskPackage->u.extendedService;
1989         Odr_oct *id = taskPackage->targetReference;
1990
1991         if (id)
1992             ZOOM_options_setl (c->tasks->u.package->options,
1993                                "targetReference", (char*) id->buf, id->len);
1994     }
1995     return 1;
1996 }
1997
1998
1999 static void handle_apdu (ZOOM_connection c, Z_APDU *apdu)
2000 {
2001     Z_InitResponse *initrs;
2002
2003     c->mask = 0;
2004     yaz_log (LOG_DEBUG, "handle_apdu type=%d", apdu->which);
2005     switch(apdu->which)
2006     {
2007     case Z_APDU_initResponse:
2008         initrs = apdu->u.initResponse;
2009         if (!*initrs->result)
2010         {
2011             c->error = ZOOM_ERROR_INIT;
2012         }
2013         else
2014         {
2015             char *cookie =
2016                 yaz_oi_get_string_oidval (&apdu->u.initResponse->otherInfo,
2017                                           VAL_COOKIE, 1, 0);
2018             xfree (c->cookie_in);
2019             c->cookie_in = 0;
2020             if (cookie)
2021                 c->cookie_in = xstrdup(cookie);
2022             if (ODR_MASK_GET(initrs->options, Z_Options_namedResultSets) &&
2023                 ODR_MASK_GET(initrs->protocolVersion, Z_ProtocolVersion_3))
2024                 c->support_named_resultsets = 1;
2025             if (c->tasks)
2026             {
2027                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2028                 ZOOM_connection_remove_task (c);
2029             }
2030             ZOOM_connection_exec_task (c);
2031         }
2032         if (ODR_MASK_GET(initrs->options, Z_Options_negotiationModel))
2033         {
2034             NMEM tmpmem = nmem_create();
2035             Z_CharSetandLanguageNegotiation *p =
2036                 yaz_get_charneg_record(initrs->otherInfo);
2037
2038             if (p)
2039             {
2040                 char *charset=NULL, *lang=NULL;
2041                 int sel;
2042
2043                 yaz_get_response_charneg(tmpmem, p, &charset, &lang, &sel);
2044                 yaz_log(LOG_DEBUG, "Target accepted: charset %s, "
2045                         "language %s, select %d",
2046                         charset ? charset : "none", lang ? lang : "none", sel);
2047                 if (charset)
2048                     ZOOM_connection_option_set (c, "negotiation-charset",
2049                                                 charset);
2050                 if (lang)
2051                     ZOOM_connection_option_set (c, "negotiation-lang",
2052                                                 lang);
2053                 nmem_destroy(tmpmem);
2054             }
2055         }
2056         break;
2057     case Z_APDU_searchResponse:
2058         handle_search_response (c, apdu->u.searchResponse);
2059         if (send_sort_present (c) == zoom_complete)
2060             ZOOM_connection_remove_task (c);
2061         break;
2062     case Z_APDU_presentResponse:
2063         handle_present_response (c, apdu->u.presentResponse);
2064         if (send_present (c) == zoom_complete)
2065             ZOOM_connection_remove_task (c);
2066         break;
2067     case Z_APDU_sortResponse:
2068         sort_response (c, apdu->u.sortResponse);
2069         if (send_present (c) == zoom_complete)
2070             ZOOM_connection_remove_task (c);
2071         break;
2072     case Z_APDU_scanResponse:
2073         scan_response (c, apdu->u.scanResponse);
2074         ZOOM_connection_remove_task (c);
2075         break;
2076     case Z_APDU_extendedServicesResponse:
2077         es_response (c, apdu->u.extendedServicesResponse);
2078         ZOOM_connection_remove_task (c);
2079         break;
2080     case Z_APDU_close:
2081         if (c->reconnect_ok)
2082         {
2083             do_close(c);
2084             c->tasks->running = 0;
2085             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2086         }
2087         else
2088         {
2089             c->error = ZOOM_ERROR_CONNECTION_LOST;
2090             do_close(c);
2091         }
2092         break;
2093     default:
2094         c->error = ZOOM_ERROR_DECODE;
2095         do_close(c);
2096     }
2097 }
2098
2099 static int do_read (ZOOM_connection c)
2100 {
2101     int r;
2102     Z_APDU *apdu;
2103     ZOOM_Event event;
2104
2105     event = ZOOM_Event_create (ZOOM_EVENT_RECV_DATA);
2106     ZOOM_connection_put_event (c, event);
2107
2108     yaz_log (LOG_DEBUG, "do_read len=%d", c->len_in);
2109
2110     r = cs_get (c->cs, &c->buf_in, &c->len_in);
2111     if (r == 1)
2112         return 0;
2113     if (r <= 0)
2114     {
2115         if (c->reconnect_ok)
2116         {
2117             do_close (c);
2118             c->reconnect_ok = 0;
2119             yaz_log (LOG_DEBUG, "reconnect read");
2120             c->tasks->running = 0;
2121             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2122         }
2123         else
2124         {
2125             c->error= ZOOM_ERROR_CONNECTION_LOST;
2126             do_close (c);
2127         }
2128     }
2129     else
2130     {
2131         ZOOM_Event event;
2132         odr_reset (c->odr_in);
2133         odr_setbuf (c->odr_in, c->buf_in, r, 0);
2134         event = ZOOM_Event_create (ZOOM_EVENT_RECV_APDU);
2135         ZOOM_connection_put_event (c, event);
2136         if (!z_APDU (c->odr_in, &apdu, 0, 0))
2137         {
2138             c->error = ZOOM_ERROR_DECODE;
2139             do_close (c);
2140         }
2141         else
2142             handle_apdu (c, apdu);
2143         c->reconnect_ok = 0;
2144     }
2145     return 1;
2146 }
2147
2148 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out)
2149 {
2150     int r;
2151     ZOOM_Event event;
2152
2153     event = ZOOM_Event_create(ZOOM_EVENT_SEND_DATA);
2154     ZOOM_connection_put_event (c, event);
2155
2156     yaz_log (LOG_DEBUG, "do_write_ex len=%d", len_out);
2157     if ((r=cs_put (c->cs, buf_out, len_out)) < 0)
2158     {
2159         if (c->reconnect_ok)
2160         {
2161             do_close (c);
2162             c->reconnect_ok = 0;
2163             yaz_log (LOG_DEBUG, "reconnect write");
2164             c->tasks->running = 0;
2165             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2166             return zoom_complete;
2167         }
2168         if (c->state == STATE_CONNECTING)
2169             c->error = ZOOM_ERROR_CONNECT;
2170         else
2171             c->error = ZOOM_ERROR_CONNECTION_LOST;
2172         do_close (c);
2173         return zoom_complete;
2174     }
2175     else if (r == 1)
2176     {
2177         c->mask = ZOOM_SELECT_EXCEPT;
2178         if (c->cs->io_pending & CS_WANT_WRITE)
2179             c->mask += ZOOM_SELECT_WRITE;
2180         if (c->cs->io_pending & CS_WANT_READ)
2181             c->mask += ZOOM_SELECT_READ;
2182         yaz_log (LOG_DEBUG, "do_write_ex 1 mask=%d", c->mask);
2183     }
2184     else
2185     {
2186         c->mask = ZOOM_SELECT_READ|ZOOM_SELECT_EXCEPT;
2187         yaz_log (LOG_DEBUG, "do_write_ex 2 mask=%d", c->mask);
2188     }
2189     return zoom_pending;
2190 }
2191
2192 static zoom_ret do_write(ZOOM_connection c)
2193 {
2194     return do_write_ex (c, c->buf_out, c->len_out);
2195 }
2196
2197
2198 ZOOM_API(const char *)
2199 ZOOM_connection_option_get (ZOOM_connection c, const char *key)
2200 {
2201     return ZOOM_options_get (c->options, key);
2202 }
2203
2204 ZOOM_API(void)
2205 ZOOM_connection_option_set (ZOOM_connection c, const char *key,
2206                                   const char *val)
2207 {
2208     ZOOM_options_set (c->options, key, val);
2209 }
2210
2211 ZOOM_API(const char *)
2212 ZOOM_resultset_option_get (ZOOM_resultset r, const char *key)
2213 {
2214     return ZOOM_options_get (r->options, key);
2215 }
2216
2217 ZOOM_API(void)
2218 ZOOM_resultset_option_set (ZOOM_resultset r, const char *key,
2219                                   const char *val)
2220 {
2221     ZOOM_options_set (r->options, key, val);
2222 }
2223
2224
2225 ZOOM_API(int)
2226 ZOOM_connection_errcode (ZOOM_connection c)
2227 {
2228     return ZOOM_connection_error (c, 0, 0);
2229 }
2230
2231 ZOOM_API(const char *)
2232 ZOOM_connection_errmsg (ZOOM_connection c)
2233 {
2234     const char *msg;
2235     ZOOM_connection_error (c, &msg, 0);
2236     return msg;
2237 }
2238
2239 ZOOM_API(const char *)
2240 ZOOM_connection_addinfo (ZOOM_connection c)
2241 {
2242     const char *addinfo;
2243     ZOOM_connection_error (c, 0, &addinfo);
2244     return addinfo;
2245 }
2246
2247 ZOOM_API(const char *)
2248 ZOOM_diag_str (int error)
2249 {
2250     switch (error)
2251     {
2252     case ZOOM_ERROR_NONE:
2253         return "No error";
2254     case ZOOM_ERROR_CONNECT:
2255         return "Connect failed";
2256     case ZOOM_ERROR_MEMORY:
2257         return "Out of memory";
2258     case ZOOM_ERROR_ENCODE:
2259         return "Encoding failed";
2260     case ZOOM_ERROR_DECODE:
2261         return "Decoding failed";
2262     case ZOOM_ERROR_CONNECTION_LOST:
2263         return "Connection lost";
2264     case ZOOM_ERROR_INIT:
2265         return "Init rejected";
2266     case ZOOM_ERROR_INTERNAL:
2267         return "Internal failure";
2268     case ZOOM_ERROR_TIMEOUT:
2269         return "Timeout";
2270     default:
2271         return diagbib1_str (error);
2272     }
2273 }
2274
2275 ZOOM_API(int)
2276 ZOOM_connection_error (ZOOM_connection c, const char **cp,
2277                             const char **addinfo)
2278 {
2279     int error = c->error;
2280     if (cp)
2281     {
2282         *cp = ZOOM_diag_str(error);
2283     }
2284     if (addinfo)
2285     {
2286         if (c->addinfo)
2287             *addinfo = c->addinfo;
2288         else
2289             *addinfo = "";
2290     }
2291     return c->error;
2292 }
2293
2294 static int ZOOM_connection_do_io(ZOOM_connection c, int mask)
2295 {
2296     ZOOM_Event event = 0;
2297     int r = cs_look(c->cs);
2298     yaz_log (LOG_DEBUG, "ZOOM_connection_do_io c=%p mask=%d cs_look=%d",
2299              c, mask, r);
2300
2301     if (r == CS_NONE)
2302     {
2303         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2304         c->error = ZOOM_ERROR_CONNECT;
2305         do_close (c);
2306         ZOOM_connection_put_event (c, event);
2307     }
2308     else if (r == CS_CONNECT)
2309     {
2310         int ret;
2311         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2312
2313         ret = cs_rcvconnect (c->cs);
2314         yaz_log (LOG_DEBUG, "cs_rcvconnect returned %d", ret);
2315         if (ret == 1)
2316         {
2317             c->mask = ZOOM_SELECT_EXCEPT;
2318             if (c->cs->io_pending & CS_WANT_WRITE)
2319                 c->mask += ZOOM_SELECT_WRITE;
2320             if (c->cs->io_pending & CS_WANT_READ)
2321                 c->mask += ZOOM_SELECT_READ;
2322             ZOOM_connection_put_event (c, event);
2323         }
2324         else if (ret == 0)
2325         {
2326             ZOOM_connection_put_event (c, event);
2327             ZOOM_connection_send_init (c);
2328             c->state = STATE_ESTABLISHED;
2329         }
2330         else
2331         {
2332             c->error = ZOOM_ERROR_CONNECT;
2333             do_close (c);
2334             ZOOM_connection_put_event (c, event);
2335         }
2336     }
2337     else
2338     {
2339         if (mask & ZOOM_SELECT_READ)
2340             do_read (c);
2341         if (c->cs && (mask & ZOOM_SELECT_WRITE))
2342             do_write (c);
2343     }
2344     return 1;
2345 }
2346
2347 ZOOM_API(int)
2348 ZOOM_connection_last_event(ZOOM_connection cs)
2349 {
2350     if (!cs)
2351         return ZOOM_EVENT_NONE;
2352     return cs->last_event;
2353 }
2354
2355 ZOOM_API(int)
2356 ZOOM_event (int no, ZOOM_connection *cs)
2357 {
2358     int timeout = 5000;
2359 #if HAVE_SYS_POLL_H
2360     struct pollfd pollfds[1024];
2361     ZOOM_connection poll_cs[1024];
2362 #else
2363     struct timeval tv;
2364     fd_set input, output, except;
2365 #endif
2366     int i, r, nfds;
2367     int max_fd = 0;
2368
2369     for (i = 0; i<no; i++)
2370     {
2371         ZOOM_connection c = cs[i];
2372         ZOOM_Event event;
2373         if (c && (event = ZOOM_connection_get_event(c)))
2374         {
2375             ZOOM_Event_destroy (event);
2376             return i+1;
2377         }
2378     }
2379     for (i = 0; i<no; i++)
2380     {
2381         ZOOM_connection c = cs[i];
2382         ZOOM_Event event;
2383         if (c && ZOOM_connection_exec_task (c))
2384         {
2385             if ((event = ZOOM_connection_get_event(c)))
2386             {
2387                 ZOOM_Event_destroy (event);
2388                 return i+1;
2389             }
2390         }
2391     }
2392 #if HAVE_SYS_POLL_H
2393
2394 #else
2395     FD_ZERO (&input);
2396     FD_ZERO (&output);
2397     FD_ZERO (&except);
2398 #endif
2399     nfds = 0;
2400     for (i = 0; i<no; i++)
2401     {
2402         ZOOM_connection c = cs[i];
2403         int fd, mask;
2404         int this_timeout;
2405
2406         if (!c)
2407             continue;
2408         fd = z3950_connection_socket(c);
2409         mask = z3950_connection_mask(c);
2410
2411         if (fd == -1)
2412             continue;
2413         if (max_fd < fd)
2414             max_fd = fd;
2415
2416         this_timeout = ZOOM_options_get_int (c->options, "timeout", -1);
2417         if (this_timeout != -1 && this_timeout < timeout)
2418             timeout = this_timeout;
2419 #if HAVE_SYS_POLL_H
2420         if (mask)
2421         {
2422             short poll_events = 0;
2423
2424             if (mask & ZOOM_SELECT_READ)
2425                 poll_events += POLLIN;
2426             if (mask & ZOOM_SELECT_WRITE)
2427                 poll_events += POLLOUT;
2428             if (mask & ZOOM_SELECT_EXCEPT)
2429                 poll_events += POLLERR;
2430             pollfds[nfds].fd = fd;
2431             pollfds[nfds].events = poll_events;
2432             pollfds[nfds].revents = 0;
2433             poll_cs[nfds] = c;
2434             nfds++;
2435         }
2436 #else
2437         if (mask & ZOOM_SELECT_READ)
2438         {
2439             FD_SET (fd, &input);
2440             nfds++;
2441         }
2442         if (mask & ZOOM_SELECT_WRITE)
2443         {
2444             FD_SET (fd, &output);
2445             nfds++;
2446         }
2447         if (mask & ZOOM_SELECT_EXCEPT)
2448         {
2449             FD_SET (fd, &except);
2450             nfds++;
2451         }
2452 #endif
2453     }
2454     if (timeout >= 5000)
2455         timeout = 30;
2456
2457     if (!nfds)
2458         return 0;
2459
2460 #if HAVE_SYS_POLL_H
2461     r = poll (pollfds, nfds, timeout * 1000);
2462     for (i = 0; i<nfds; i++)
2463     {
2464         ZOOM_connection c = poll_cs[i];
2465         if (r && c->mask)
2466         {
2467             int mask = 0;
2468             if (pollfds[i].revents & POLLIN)
2469                 mask += ZOOM_SELECT_READ;
2470             if (pollfds[i].revents & POLLOUT)
2471                 mask += ZOOM_SELECT_WRITE;
2472             if (pollfds[i].revents & POLLERR)
2473                 mask += ZOOM_SELECT_EXCEPT;
2474             if (mask)
2475                 ZOOM_connection_do_io(c, mask);
2476         }
2477         else if (r == 0 && c->mask)
2478         {
2479             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
2480             /* timeout and this connection was waiting */
2481             c->error = ZOOM_ERROR_TIMEOUT;
2482             do_close (c);
2483             ZOOM_connection_put_event(c, event);
2484         }
2485     }
2486 #else
2487     tv.tv_sec = timeout;
2488     tv.tv_usec = 0;
2489     yaz_log (LOG_DEBUG, "select start");
2490     r = select (max_fd+1, &input, &output, &except, &tv);
2491     yaz_log (LOG_DEBUG, "select stop, returned r=%d", r);
2492     for (i = 0; i<no; i++)
2493     {
2494         ZOOM_connection c = cs[i];
2495         int fd, mask;
2496
2497         if (!c)
2498             continue;
2499         fd = z3950_connection_socket(c);
2500         mask = 0;
2501         if (r && c->mask)
2502         {
2503             /* no timeout and real socket */
2504             if (FD_ISSET(fd, &input))
2505                 mask += ZOOM_SELECT_READ;
2506             if (FD_ISSET(fd, &output))
2507                 mask += ZOOM_SELECT_WRITE;
2508             if (FD_ISSET(fd, &except))
2509                 mask += ZOOM_SELECT_EXCEPT;
2510             if (mask)
2511                 ZOOM_connection_do_io(c, mask);
2512         }
2513         if (r == 0 && c->mask)
2514         {
2515             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
2516             /* timeout and this connection was waiting */
2517             c->error = ZOOM_ERROR_TIMEOUT;
2518             do_close (c);
2519             yaz_log (LOG_DEBUG, "timeout");
2520             ZOOM_connection_put_event(c, event);
2521         }
2522     }
2523 #endif
2524     for (i = 0; i<no; i++)
2525     {
2526         ZOOM_connection c = cs[i];
2527         ZOOM_Event event;
2528         if (c && (event = ZOOM_connection_get_event(c)))
2529         {
2530             ZOOM_Event_destroy (event);
2531             return i+1;
2532         }
2533     }
2534     return 0;
2535 }